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History (derived from Ancient Greek ἱστορία (historía) 'inquiry; knowledge acquired by investigation') is the systematic study and documentation of human past. History is an academic discipline which uses a narrative to describe, examine, question, and analyze past events, and investigate their patterns of cause and effect. Historians debate which narrative best explains an event, as well as the significance of different causes and effects. Historians debate the nature of history as an end in itself, and its usefulness in giving perspective on the problems of the present.

The period of events before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well as the memory, discovery, collection, organization, presentation, and interpretation of these events. Historians seek knowledge of the past using historical sources such as written documents, oral accounts or traditional oral histories, art and material artifacts, and ecological markers. History is incomplete and still has debatable mysteries.

Stories common to a particular culture, but not supported by external sources (such as the tales surrounding King Arthur), are usually classified as cultural heritage or legends. History differs from myth in that it is supported by verifiable evidence. However, ancient cultural influences have helped create variant interpretations of the nature of history, which have evolved over the centuries and continue to change today. The modern study of history is wide-ranging, and includes the study of specific regions and certain topical or thematic elements of historical investigation. History is taught as a part of primary and secondary education, and the academic study of history is a major discipline in universities.

Herodotus, a 5th-century BCE Greek historian, is often considered the "father of history", as one of the first historians in the Western tradition, though he has been criticized as the "father of lies". Along with his contemporary Thucydides, he helped form the foundations for the modern study of past events and societies. Their works continue to be read today, and the gap between the culture-focused Herodotus and the military-focused Thucydides remains a point of contention or approach in modern historical writing. In East Asia a state chronicle, the Spring and Autumn Annals, was reputed to date from as early as 722 BCE, though only 2nd-century BCE texts have survived. The title "father of history" has also been attributed, in their respective societies, to Sima Qian and Ibn Khaldun. (Full article...)

Outline of history · Index
Featured articles are displayed here, which represent some of the best content on English Wikipedia.
  • Image 1 On November 2, 2002, U.S. Marine Corps Major Michael Brown attempted an indecent assault on a Filipina bartender in Okinawa, Japan. The bartender accused Brown of attempting to rape her and of throwing her cell phone into a nearby river; Brown denied the rape charges. The victim later recanted and attempted to withdraw the accusation, though prosecutors presented evidence that she had received a cash payment just before doing so. The case received extensive attention in the Japanese media, especially in Okinawa, and the crime sparked a public debate over the U.S. military presence in Japan, the privileges of extraterritoriality, as well as the fair-trial practices of Japanese legal system and the Japanese police. The case involved the Treaty of Mutual Cooperation and Security Between the United States and Japan and the U.S.–Japan Status of Forces Agreement (SOFA). (Full article...)
    On November 2, 2002, U.S. Marine Corps Major Michael Brown attempted an indecent assault on a Filipina bartender in Okinawa, Japan. The bartender accused Brown of attempting to rape her and of throwing her cell phone into a nearby river; Brown denied the rape charges. The victim later recanted and attempted to withdraw the accusation, though prosecutors presented evidence that she had received a cash payment just before doing so.

    The case received extensive attention in the Japanese media, especially in Okinawa, and the crime sparked a public debate over the U.S. military presence in Japan, the privileges of extraterritoriality, as well as the fair-trial practices of Japanese legal system and the Japanese police. The case involved the Treaty of Mutual Cooperation and Security Between the United States and Japan and the U.S.–Japan Status of Forces Agreement (SOFA). (Full article...)
  • Image 2 Depiction of Tolui from a 14th-century manuscript of Rashid al-Din's Jami al-tawarikh Tolui (c. 1191–1232) was the youngest son of Genghis Khan and Börte. A prominent general during the early Mongol conquests, Tolui was a leading candidate to succeed his father after his death in 1227 and ultimately served as regent of the Mongol Empire until the accession of his brother Ögedei two years later. Tolui's wife was Sorghaghtani Beki; their sons included Möngke and Kublai, the fourth and fifth khagans of the empire, and Hulagu, the founder of the Ilkhanate. Tolui was less active than his elder brothers Jochi, Chagatai, and Ögedei during their father's rise to power, but once he reached adulthood he was considered the finest warrior of the four. He commanded armies under his father during the first invasion of Jin China (1211–1215), and his distinguished service during the Mongol invasion of the Khwarazmian Empire secured his reputation. After the fall of the cities of Transoxiana in 1220, Genghis dispatched Tolui early the following year to subjugate the region of Khorasan, which had begun to cause trouble for the Mongol armies. Tolui executed his orders with ruthless efficiency, assaulting the major cities of Merv, Nishapur, and Herat, and subjugating numerous others. Medieval chroniclers attributed more than three million deaths to the massacres he ordered at Nishapur and Merv; while these figures are considered exaggerated by modern historians, they are evidence of the abnormal brutality of Tolui's campaign. (Full article...)

    Depiction of Tolui from a 14th-century manuscript of Rashid al-Din's Jami al-tawarikh

    Tolui (c. 1191–1232) was the youngest son of Genghis Khan and Börte. A prominent general during the early Mongol conquests, Tolui was a leading candidate to succeed his father after his death in 1227 and ultimately served as regent of the Mongol Empire until the accession of his brother Ögedei two years later. Tolui's wife was Sorghaghtani Beki; their sons included Möngke and Kublai, the fourth and fifth khagans of the empire, and Hulagu, the founder of the Ilkhanate.

    Tolui was less active than his elder brothers Jochi, Chagatai, and Ögedei during their father's rise to power, but once he reached adulthood he was considered the finest warrior of the four. He commanded armies under his father during the first invasion of Jin China (1211–1215), and his distinguished service during the Mongol invasion of the Khwarazmian Empire secured his reputation. After the fall of the cities of Transoxiana in 1220, Genghis dispatched Tolui early the following year to subjugate the region of Khorasan, which had begun to cause trouble for the Mongol armies. Tolui executed his orders with ruthless efficiency, assaulting the major cities of Merv, Nishapur, and Herat, and subjugating numerous others. Medieval chroniclers attributed more than three million deaths to the massacres he ordered at Nishapur and Merv; while these figures are considered exaggerated by modern historians, they are evidence of the abnormal brutality of Tolui's campaign. (Full article...)
  • Image 3 Retvizan (Russian: Ретвизан) was a pre-dreadnought battleship built before the Russo-Japanese War of 1904–1905 for the Imperial Russian Navy. She was built by the American William Cramp & Sons because Russian shipyards were already at full capacity. Named after a Swedish ship of the line that was captured during the battle of Vyborg Bay in 1790 (Swedish: Rättvisan, meaning both fairness and justice), Retvizan was briefly assigned to the Baltic Fleet, but was transferred to the Far East in 1902. The ship was torpedoed during the Japanese surprise attack on Port Arthur during the night of 8/9 February 1904 and grounded in the harbour entrance when she attempted to take refuge inside, as her draft had significantly deepened from the amount of water she had taken aboard after the torpedo hit. She was refloated and repaired in time to join the rest of the 1st Pacific Squadron when they attempted to reach Vladivostok through the Japanese blockade on 10 August. The Japanese battle fleet engaged them again in the Battle of the Yellow Sea, forcing most of the Russian ships to return to Port Arthur after their squadron commander was killed and his flagship damaged. Retvizan was sunk by Japanese howitzers in December after the Japanese gained control of the heights around the harbour. (Full article...)
    Retvizan (Russian: Ретвизан) was a pre-dreadnought battleship built before the Russo-Japanese War of 1904–1905 for the Imperial Russian Navy. She was built by the American William Cramp & Sons because Russian shipyards were already at full capacity. Named after a Swedish ship of the line that was captured during the battle of Vyborg Bay in 1790 (Swedish: Rättvisan, meaning both fairness and justice), Retvizan was briefly assigned to the Baltic Fleet, but was transferred to the Far East in 1902.

    The ship was torpedoed during the Japanese surprise attack on Port Arthur during the night of 8/9 February 1904 and grounded in the harbour entrance when she attempted to take refuge inside, as her draft had significantly deepened from the amount of water she had taken aboard after the torpedo hit. She was refloated and repaired in time to join the rest of the 1st Pacific Squadron when they attempted to reach Vladivostok through the Japanese blockade on 10 August. The Japanese battle fleet engaged them again in the Battle of the Yellow Sea, forcing most of the Russian ships to return to Port Arthur after their squadron commander was killed and his flagship damaged. Retvizan was sunk by Japanese howitzers in December after the Japanese gained control of the heights around the harbour. (Full article...)
  • Image 4 Northampton War Memorial, officially the Town and County War Memorial, is a First World War memorial on Wood Hill in the centre of Northampton, the county town of Northamptonshire, in central England. Designed by architect Sir Edwin Lutyens, it is a Stone of Remembrance flanked by twin obelisks draped with painted stone flags standing in a small garden in what was once part of the churchyard of All Saints' Church. Discussion of a war memorial for Northampton began shortly after the armistice in 1918, and from July 1919 a temporary wooden cenotaph stood on Abington Street in the town centre. The Northamptonshire War Memorial Committee commissioned Lutyens to design a permanent memorial. The monument's design was completed and approved quickly, but its installation was delayed by six years until the site could be purchased from the Church of England, which required a faculty from the local diocese. The memorial was finally unveiled on 11 November 1926 after a service and a parade including local schoolchildren and civic leaders. (Full article...)

    Northampton War Memorial, officially the Town and County War Memorial, is a First World War memorial on Wood Hill in the centre of Northampton, the county town of Northamptonshire, in central England. Designed by architect Sir Edwin Lutyens, it is a Stone of Remembrance flanked by twin obelisks draped with painted stone flags standing in a small garden in what was once part of the churchyard of All Saints' Church.

    Discussion of a war memorial for Northampton began shortly after the armistice in 1918, and from July 1919 a temporary wooden cenotaph stood on Abington Street in the town centre. The Northamptonshire War Memorial Committee commissioned Lutyens to design a permanent memorial. The monument's design was completed and approved quickly, but its installation was delayed by six years until the site could be purchased from the Church of England, which required a faculty from the local diocese. The memorial was finally unveiled on 11 November 1926 after a service and a parade including local schoolchildren and civic leaders. (Full article...)
  • Image 5 Design for the Amagi class The Amagi class (天城型, Amagi-gata) was a series of four battlecruisers planned for the Imperial Japanese Navy (IJN) as part of the Eight-eight fleet in the early 1920s. The ships were to be named Amagi, Akagi, Atago, and Takao. The Amagi design was essentially a lengthened version of the Tosa-class battleship, but with a thinner armored belt and deck, a more powerful propulsion system, and a modified secondary armament arrangement. They were to have carried the same main battery of ten 41 cm (16.1 in) guns and been capable of a top speed of 30 knots (56 km/h; 35 mph). Limitations imposed by the 1922 Washington Naval Treaty prevented the class from being completed as designed. However, the treaty had a limited allowance for hulls already under construction to be converted into aircraft carriers. Amagi and Akagi were both intended for conversion, but an earthquake damaged the hull of Amagi so extensively that the ship was scrapped. Akagi was reconstructed as an aircraft carrier and served with distinction as part of the Kido Butai during the Second World War, participating in the Japanese attack on Pearl Harbor before being sunk at the Battle of Midway. (Full article...)

    Design for the Amagi class

    The Amagi class (天城型, Amagi-gata) was a series of four battlecruisers planned for the Imperial Japanese Navy (IJN) as part of the Eight-eight fleet in the early 1920s. The ships were to be named Amagi, Akagi, Atago, and Takao. The Amagi design was essentially a lengthened version of the Tosa-class battleship, but with a thinner armored belt and deck, a more powerful propulsion system, and a modified secondary armament arrangement. They were to have carried the same main battery of ten 41 cm (16.1 in) guns and been capable of a top speed of 30 knots (56 km/h; 35 mph).

    Limitations imposed by the 1922 Washington Naval Treaty prevented the class from being completed as designed. However, the treaty had a limited allowance for hulls already under construction to be converted into aircraft carriers. Amagi and Akagi were both intended for conversion, but an earthquake damaged the hull of Amagi so extensively that the ship was scrapped. Akagi was reconstructed as an aircraft carrier and served with distinction as part of the Kido Butai during the Second World War, participating in the Japanese attack on Pearl Harbor before being sunk at the Battle of Midway. (Full article...)
  • Image 6 Preussen in 1907 The Braunschweig-class battleships were a group of five pre-dreadnought battleships of the German Kaiserliche Marine (Imperial Navy) built in the early 1900s. They were the first class of battleships authorized under the Second Naval Law, a major naval expansion program. The class comprised five ships—Braunschweig, Elsass, Hessen, Preussen, and Lothringen—and they were an improvement over the preceding Wittelsbach class. The Braunschweigs mounted a more powerful armament of 28 cm (11 in) and 17 cm (6.7 in) guns (compared to 24 cm (9.4 in) and 15 cm (5.9 in) guns of the Wittelsbachs). Less than two years after the first members of the class entered service, the ships were rendered obsolescent by the British all-big-gun battleship Dreadnought, which curtailed their careers. During their early careers, the five ships served in II Battle Squadron, with Preussen its flagship. The fleet was occupied primarily with routine peacetime training and foreign visits. In 1912, Braunschweig was placed in reserve and she was joined the following year by Elsass. Lothringen and Hessen were slated to be decommissioned in 1914, but the outbreak of World War I in July prevented this and they remained in service with the High Seas Fleet. They and Preussen took part in the fleet operations in the first two years of the war, while Braunschweig and Elsass went to the Baltic with IV Battle Squadron, where they eventually saw combat with the Russian battleship Slava during the Battle of the Gulf of Riga in August 1915. Hessen took part in the Battle of Jutland in May 1916 and saw limited combat with British battlecruisers late in the battle. All five of the ships were withdrawn from service starting in 1916, thereafter being used in subsidiary roles, including as barracks and training ships. (Full article...)

    Preussen in 1907

    The Braunschweig-class battleships were a group of five pre-dreadnought battleships of the German Kaiserliche Marine (Imperial Navy) built in the early 1900s. They were the first class of battleships authorized under the Second Naval Law, a major naval expansion program. The class comprised five ships—Braunschweig, Elsass, Hessen, Preussen, and Lothringen—and they were an improvement over the preceding Wittelsbach class. The Braunschweigs mounted a more powerful armament of 28 cm (11 in) and 17 cm (6.7 in) guns (compared to 24 cm (9.4 in) and 15 cm (5.9 in) guns of the Wittelsbachs). Less than two years after the first members of the class entered service, the ships were rendered obsolescent by the British all-big-gun battleship Dreadnought, which curtailed their careers.

    During their early careers, the five ships served in II Battle Squadron, with Preussen its flagship. The fleet was occupied primarily with routine peacetime training and foreign visits. In 1912, Braunschweig was placed in reserve and she was joined the following year by Elsass. Lothringen and Hessen were slated to be decommissioned in 1914, but the outbreak of World War I in July prevented this and they remained in service with the High Seas Fleet. They and Preussen took part in the fleet operations in the first two years of the war, while Braunschweig and Elsass went to the Baltic with IV Battle Squadron, where they eventually saw combat with the Russian battleship Slava during the Battle of the Gulf of Riga in August 1915. Hessen took part in the Battle of Jutland in May 1916 and saw limited combat with British battlecruisers late in the battle. All five of the ships were withdrawn from service starting in 1916, thereafter being used in subsidiary roles, including as barracks and training ships. (Full article...)
  • Image 7 Lovell in 1969 James Arthur Lovell Jr. (/ˈlʌvəl/ LUV-əl; born March 25, 1928) is an American retired astronaut, naval aviator, test pilot and mechanical engineer. In 1968, as command module pilot of Apollo 8, he became, with Frank Borman and William Anders, one of the first three astronauts to fly to and orbit the Moon. He then commanded the Apollo 13 lunar mission in 1970 which, after a critical failure en route, looped around the Moon and returned safely to Earth. A graduate of the United States Naval Academy in Annapolis, Maryland, in the class of 1952, Lovell flew F2H Banshee night fighters. This included a Western Pacific deployment aboard the aircraft carrier USS Shangri-La. In January 1958, he entered a six-month test pilot training course at the Naval Air Test Center at Naval Air Station Patuxent River, Maryland, with Class 20 and graduated at the top of the class. He was then assigned to Electronics Test, working with radar, and in 1960 he became the Navy's McDonnell Douglas F-4 Phantom II program manager. The following year he became a flight instructor and safety engineering officer at Naval Air Station Oceana in Virginia Beach, Virginia, and completed Aviation Safety School at the University of Southern California. (Full article...)

    Lovell in 1969

    James Arthur Lovell Jr. (/ˈlʌvəl/ LUV-əl; born March 25, 1928) is an American retired astronaut, naval aviator, test pilot and mechanical engineer. In 1968, as command module pilot of Apollo 8, he became, with Frank Borman and William Anders, one of the first three astronauts to fly to and orbit the Moon. He then commanded the Apollo 13 lunar mission in 1970 which, after a critical failure en route, looped around the Moon and returned safely to Earth.

    A graduate of the United States Naval Academy in Annapolis, Maryland, in the class of 1952, Lovell flew F2H Banshee night fighters. This included a Western Pacific deployment aboard the aircraft carrier USS Shangri-La. In January 1958, he entered a six-month test pilot training course at the Naval Air Test Center at Naval Air Station Patuxent River, Maryland, with Class 20 and graduated at the top of the class. He was then assigned to Electronics Test, working with radar, and in 1960 he became the Navy's McDonnell Douglas F-4 Phantom II program manager. The following year he became a flight instructor and safety engineering officer at Naval Air Station Oceana in Virginia Beach, Virginia, and completed Aviation Safety School at the University of Southern California. (Full article...)
  • Image 8 Portrait, c. 1870–1880 Rutherford Birchard Hayes (/ˈrʌðərfərd/; October 4, 1822 – January 17, 1893) was an American military officer, lawyer, and politician who served as the 19th president of the United States from 1877 to 1881. As an attorney in Ohio, Hayes served as Cincinnati's city solicitor from 1858 to 1861. He was a staunch abolitionist who defended refugee slaves in court proceedings. At the start of the American Civil War, he left a fledgling political career to join the Union Army as an officer. Hayes was wounded five times, most seriously at the Battle of South Mountain in 1862. He earned a reputation for bravery in combat, rising in the ranks to serve as brevet major general. After the war, he earned a reputation in the Republican Party as a prominent member of the "Half-Breed" faction. He served in Congress from 1865 to 1867 and was elected governor of Ohio, serving two consecutive terms from 1868 to 1872 and half of a third two-year term from 1876 to 1877 before his swearing-in as president. (Full article...)

    Portrait, c. 1870–1880

    Rutherford Birchard Hayes (/ˈrʌðərfərd/; October 4, 1822 – January 17, 1893) was an American military officer, lawyer, and politician who served as the 19th president of the United States from 1877 to 1881.

    As an attorney in Ohio, Hayes served as Cincinnati's city solicitor from 1858 to 1861. He was a staunch abolitionist who defended refugee slaves in court proceedings. At the start of the American Civil War, he left a fledgling political career to join the Union Army as an officer. Hayes was wounded five times, most seriously at the Battle of South Mountain in 1862. He earned a reputation for bravery in combat, rising in the ranks to serve as brevet major general. After the war, he earned a reputation in the Republican Party as a prominent member of the "Half-Breed" faction. He served in Congress from 1865 to 1867 and was elected governor of Ohio, serving two consecutive terms from 1868 to 1872 and half of a third two-year term from 1876 to 1877 before his swearing-in as president. (Full article...)
  • Image 9 Official RAAF portrait of Air Marshal Sir Alister Murdoch Air Marshal Sir Alister Murray Murdoch, KBE, CB (9 December 1912 – 24 October 1984) was a senior commander in the Royal Australian Air Force (RAAF). He served as Chief of the Air Staff (CAS) from 1965 to 1969. Joining the Air Force in 1930, Murdoch trained as a seaplane pilot and participated in an Antarctic rescue mission for lost explorers in 1935. During World War II, he commanded No. 221 Squadron RAF in Europe and the Middle East, and later occupied senior positions on the staff of RAAF formations in the South West Pacific. His post-war appointments included Commandant of RAAF College from 1952 to 1953, Air Officer Commanding (AOC) Training Command from 1953 to 1955, Deputy Chief of the Air Staff from 1958 to 1959, and AOC Operational Command from 1962 to 1965. As AOC Training Command in 1954, Murdoch headed a program to determine aircraft purchases for the RAAF; his recommendations included the C-130 Hercules transport, considered one of the most important acquisitions in the Air Force's history. His term as CAS coincided with an increased commitment to the Vietnam War, and he came into conflict with Australian Army commanders over the employment of helicopters in battle. He was also involved in assessing the readiness of the General Dynamics F-111C for RAAF service. Appointed a Companion of the Order of the Bath in 1960 and Knight Commander of the Order of the British Empire in 1966, Murdoch was the fourth in a series of CASs who had been cadets at the Royal Military College, Duntroon. He retired from the Air Force in December 1969 and died in 1984. (Full article...)

    Official RAAF portrait of Air Marshal Sir Alister Murdoch

    Air Marshal Sir Alister Murray Murdoch, KBE, CB (9 December 1912 – 24 October 1984) was a senior commander in the Royal Australian Air Force (RAAF). He served as Chief of the Air Staff (CAS) from 1965 to 1969. Joining the Air Force in 1930, Murdoch trained as a seaplane pilot and participated in an Antarctic rescue mission for lost explorers in 1935. During World War II, he commanded No. 221 Squadron RAF in Europe and the Middle East, and later occupied senior positions on the staff of RAAF formations in the South West Pacific. His post-war appointments included Commandant of RAAF College from 1952 to 1953, Air Officer Commanding (AOC) Training Command from 1953 to 1955, Deputy Chief of the Air Staff from 1958 to 1959, and AOC Operational Command from 1962 to 1965.

    As AOC Training Command in 1954, Murdoch headed a program to determine aircraft purchases for the RAAF; his recommendations included the C-130 Hercules transport, considered one of the most important acquisitions in the Air Force's history. His term as CAS coincided with an increased commitment to the Vietnam War, and he came into conflict with Australian Army commanders over the employment of helicopters in battle. He was also involved in assessing the readiness of the General Dynamics F-111C for RAAF service. Appointed a Companion of the Order of the Bath in 1960 and Knight Commander of the Order of the British Empire in 1966, Murdoch was the fourth in a series of CASs who had been cadets at the Royal Military College, Duntroon. He retired from the Air Force in December 1969 and died in 1984. (Full article...)
  • Image 10 Marshal Josip Broz Tito (furthest right) with his cabinet and principal staff officers in Drvar, days before the offensive. Operation Rösselsprung (German: Unternehmen Rösselsprung, lit. 'Knight's move') was a combined airborne and ground assault by the German XV Mountain Corps and collaborationist forces on the Supreme Headquarters of the Yugoslav Partisans in the Bosnian town of Drvar in the Independent State of Croatia during World War II. It was launched 25 May 1944, with the goal of capturing or killing Partisan leader Marshal Josip Broz Tito and destroying the headquarters, support facilities and co-located Allied military missions. It is associated with the Seventh Enemy Offensive (Serbo-Croatian: Sedma neprijateljska ofenziva) in Yugoslav history, forming part of the Seven Enemy Offensives historiographical framework. The airborne assault itself is also known as the Raid on Drvar (Serbo-Croatian: Desant na Drvar). Operation Rösselsprung was a coup de main operation, involving direct action by a combined parachute and glider-borne assault by the 500th SS Parachute Battalion and a planned subsequent link-up with ground forces of the XV Mountain Corps converging on Drvar. The airborne assault was preceded by heavy bombing of the town by the Luftwaffe. The ground forces included Home Guard forces of the Independent State of Croatia along with collaborationist Chetniks. Tito, his principal headquarters staff and the Allied military personnel escaped, despite their presence in Drvar at the time of the airborne assault. Fierce Partisan resistance in the town itself and along the approaches to Drvar contributed to the failure of the mission. Other factors included the German intelligence agencies refusing to share the limited information available on Tito's exact location, and the lack of contingency planning by the commander of the German airborne force. (Full article...)

    Marshal Josip Broz Tito (furthest right) with his cabinet and principal staff officers in Drvar, days before the offensive.

    Operation Rösselsprung (German: Unternehmen Rösselsprung, lit. 'Knight's move') was a combined airborne and ground assault by the German XV Mountain Corps and collaborationist forces on the Supreme Headquarters of the Yugoslav Partisans in the Bosnian town of Drvar in the Independent State of Croatia during World War II. It was launched 25 May 1944, with the goal of capturing or killing Partisan leader Marshal Josip Broz Tito and destroying the headquarters, support facilities and co-located Allied military missions. It is associated with the Seventh Enemy Offensive (Serbo-Croatian: Sedma neprijateljska ofenziva) in Yugoslav history, forming part of the Seven Enemy Offensives historiographical framework. The airborne assault itself is also known as the Raid on Drvar (Serbo-Croatian: Desant na Drvar).

    Operation Rösselsprung was a coup de main operation, involving direct action by a combined parachute and glider-borne assault by the 500th SS Parachute Battalion and a planned subsequent link-up with ground forces of the XV Mountain Corps converging on Drvar. The airborne assault was preceded by heavy bombing of the town by the Luftwaffe. The ground forces included Home Guard forces of the Independent State of Croatia along with collaborationist Chetniks. Tito, his principal headquarters staff and the Allied military personnel escaped, despite their presence in Drvar at the time of the airborne assault. Fierce Partisan resistance in the town itself and along the approaches to Drvar contributed to the failure of the mission. Other factors included the German intelligence agencies refusing to share the limited information available on Tito's exact location, and the lack of contingency planning by the commander of the German airborne force. (Full article...)
  • Image 11 Soviet and German deployments near Prokhorovka on the eve of the engagement of 12 July. Positions of the II SS-Panzer Corps are in blue; the red dashed line shows the position of Soviet forces directly opposing the SS-Panzer Corps. The black dashed line is the railway running from Prokhorovka southwest through the Psel corridor (the strip of land between the Psel River and a tributary of the Northern Donets River). The Battle of Prokhorovka was fought on 12 July 1943 near Prokhorovka, 87 kilometres (54 mi) southeast of Kursk, in the Soviet Union, during the Second World War. Taking place on the Eastern Front, the engagement was part of the wider Battle of Kursk and occurred when the 5th Guards Tank Army of the Soviet Red Army attacked the II SS-Panzer Corps of the German Waffen-SS in one of the largest tank battles in history. In April 1943, the German leadership began preparing for Operation Citadel, with the objective of enveloping and destroying the Soviet forces in the Kursk salient by attacking and breaking through the base of the salient from north and south simultaneously. The German offensive was delayed several times because of the vacillation of the leadership (Hitler repeatedly delayed launching the attack so that more Tiger tanks could be delivered to the front, hoping that a technical advantage would help him win the offensive) and the addition of more forces and new equipment. The Soviet high command, Stavka, had learned of the German intentions and so used the delay to prepare a series of defensive belts along the routes of the planned German offensive. The Soviet leadership also massed several armies deep behind their defences as the Stavka Reserve. The army group, the Steppe Front, was to launch counteroffensives once the German strength had dissipated. The 5th Guards Tank Army was the primary armoured formation of the Steppe Front. (Full article...)

    Soviet and German deployments near Prokhorovka on the eve of the engagement of 12 July. Positions of the II SS-Panzer Corps are in blue; the red dashed line shows the position of Soviet forces directly opposing the SS-Panzer Corps. The black dashed line is the railway running from Prokhorovka southwest through the Psel corridor (the strip of land between the Psel River and a tributary of the Northern Donets River).

    The Battle of Prokhorovka was fought on 12 July 1943 near Prokhorovka, 87 kilometres (54 mi) southeast of Kursk, in the Soviet Union, during the Second World War. Taking place on the Eastern Front, the engagement was part of the wider Battle of Kursk and occurred when the 5th Guards Tank Army of the Soviet Red Army attacked the II SS-Panzer Corps of the German Waffen-SS in one of the largest tank battles in history.

    In April 1943, the German leadership began preparing for Operation Citadel, with the objective of enveloping and destroying the Soviet forces in the Kursk salient by attacking and breaking through the base of the salient from north and south simultaneously. The German offensive was delayed several times because of the vacillation of the leadership (Hitler repeatedly delayed launching the attack so that more Tiger tanks could be delivered to the front, hoping that a technical advantage would help him win the offensive) and the addition of more forces and new equipment. The Soviet high command, Stavka, had learned of the German intentions and so used the delay to prepare a series of defensive belts along the routes of the planned German offensive. The Soviet leadership also massed several armies deep behind their defences as the Stavka Reserve. The army group, the Steppe Front, was to launch counteroffensives once the German strength had dissipated. The 5th Guards Tank Army was the primary armoured formation of the Steppe Front. (Full article...)
  • Image 12 Euclid's method for finding the greatest common divisor (GCD) of two starting lengths BA and DC, both defined to be multiples of a common "unit" length. The length DC being shorter, it is used to "measure" BA, but only once because the remainder EA is less than DC. EA now measures (twice) the shorter length DC, with remainder FC shorter than EA. Then FC measures (three times) length EA. Because there is no remainder, the process ends with FC being the GCD. On the right Nicomachus's example with numbers 49 and 21 resulting in their GCD of 7 (derived from Heath 1908:300). In mathematics, the Euclidean algorithm, or Euclid's algorithm, is an efficient method for computing the greatest common divisor (GCD) of two integers (numbers), the largest number that divides them both without a remainder. It is named after the ancient Greek mathematician Euclid, who first described it in his Elements (c. 300 BC). It is an example of an algorithm, a step-by-step procedure for performing a calculation according to well-defined rules, and is one of the oldest algorithms in common use. It can be used to reduce fractions to their simplest form, and is a part of many other number-theoretic and cryptographic calculations. The Euclidean algorithm is based on the principle that the greatest common divisor of two numbers does not change if the larger number is replaced by its difference with the smaller number. For example, 21 is the GCD of 252 and 105 (as 252 = 21 × 12 and 105 = 21 × 5), and the same number 21 is also the GCD of 105 and 252 − 105 = 147. Since this replacement reduces the larger of the two numbers, repeating this process gives successively smaller pairs of numbers until the two numbers become equal. When that occurs, that number is the GCD of the original two numbers. By reversing the steps or using the extended Euclidean algorithm, the GCD can be expressed as a linear combination of the two original numbers, that is the sum of the two numbers, each multiplied by an integer (for example, 21 = 5 × 105 + (−2) × 252). The fact that the GCD can always be expressed in this way is known as Bézout's identity. (Full article...)
    Euclid's method for finding the greatest common divisor (GCD) of two starting lengths BA and DC, both defined to be multiples of a common "unit" length. The length DC being shorter, it is used to "measure" BA, but only once because the remainder EA is less than DC. EA now measures (twice) the shorter length DC, with remainder FC shorter than EA. Then FC measures (three times) length EA. Because there is no remainder, the process ends with FC being the GCD. On the right Nicomachus's example with numbers 49 and 21 resulting in their GCD of 7 (derived from Heath 1908:300).


    In mathematics, the Euclidean algorithm, or Euclid's algorithm, is an efficient method for computing the greatest common divisor (GCD) of two integers (numbers), the largest number that divides them both without a remainder. It is named after the ancient Greek mathematician Euclid, who first described it in his Elements (c. 300 BC).
    It is an example of an algorithm, a step-by-step procedure for performing a calculation according to well-defined rules,
    and is one of the oldest algorithms in common use. It can be used to reduce fractions to their simplest form, and is a part of many other number-theoretic and cryptographic calculations.

    The Euclidean algorithm is based on the principle that the greatest common divisor of two numbers does not change if the larger number is replaced by its difference with the smaller number. For example, 21 is the GCD of 252 and 105 (as 252 = 21 × 12 and 105 = 21 × 5), and the same number 21 is also the GCD of 105 and 252 − 105 = 147. Since this replacement reduces the larger of the two numbers, repeating this process gives successively smaller pairs of numbers until the two numbers become equal. When that occurs, that number is the GCD of the original two numbers. By reversing the steps or using the extended Euclidean algorithm, the GCD can be expressed as a linear combination of the two original numbers, that is the sum of the two numbers, each multiplied by an integer (for example, 21 = 5 × 105 + (−2) × 252). The fact that the GCD can always be expressed in this way is known as Bézout's identity. (Full article...)
  • Image 13 The Battle of Saseno took place on 14 August 1264 near Saseno Island off the coast of Albania, between a fleet of the Republic of Genoa and a trade convoy of the Republic of Venice, during the War of Saint Sabas. Since the outbreak of the war in 1256, the Genoese had experienced only defeats in direct confrontations with the Venetian navy, and had therefore resorted to raiding the Venetian commerce convoys to the Levant that were critical to the Venetian economy. In mid-1264, the Genoese commander, Simone Grillo, managed to trick his Venetian counterpart, Andrea Barozzi, as to his intentions: Grillo spread rumours that he intended to head due east to the Levant, but secretly took up station at the island of Malta, south of the usual sea lanes. When Barozzi took the bait and moved east to pursue Grillo with his much larger fleet, the latter was free to attack a Venetian convoy heading out from Venice to the Levant. Confident of the absence of any threat, the convoy commander, Michele Duaro, was caught by surprise when he encountered the Genoese fleet off Saseno. The much more manoeuvreable Genoese galleys captured or sank most of the convoy's slow-moving merchant ships, except for the giant cargo vessel (nave) Roccafortis. Duaro rallied his crews there for safety, abandoning the other ships in the process. The trade goods captured by the Genoese were estimated at 100,000 Genoese liras. Venice was able to destroy the Genoese fleet two years later, however, and in 1270 the two states concluded a truce that ended the war. (Full article...)
    The Battle of Saseno took place on 14 August 1264 near Saseno Island off the coast of Albania, between a fleet of the Republic of Genoa and a trade convoy of the Republic of Venice, during the War of Saint Sabas. Since the outbreak of the war in 1256, the Genoese had experienced only defeats in direct confrontations with the Venetian navy, and had therefore resorted to raiding the Venetian commerce convoys to the Levant that were critical to the Venetian economy.

    In mid-1264, the Genoese commander, Simone Grillo, managed to trick his Venetian counterpart, Andrea Barozzi, as to his intentions: Grillo spread rumours that he intended to head due east to the Levant, but secretly took up station at the island of Malta, south of the usual sea lanes. When Barozzi took the bait and moved east to pursue Grillo with his much larger fleet, the latter was free to attack a Venetian convoy heading out from Venice to the Levant. Confident of the absence of any threat, the convoy commander, Michele Duaro, was caught by surprise when he encountered the Genoese fleet off Saseno. The much more manoeuvreable Genoese galleys captured or sank most of the convoy's slow-moving merchant ships, except for the giant cargo vessel (nave) Roccafortis. Duaro rallied his crews there for safety, abandoning the other ships in the process. The trade goods captured by the Genoese were estimated at 100,000 Genoese liras. Venice was able to destroy the Genoese fleet two years later, however, and in 1270 the two states concluded a truce that ended the war. (Full article...)
  • Image 14 USS Princess Matoika (ID-2290) under way in 1919 USS Princess Matoika (ID-2290) was a transport ship for the United States Navy during World War I. Before the war, she was a Barbarossa-class ocean liner that sailed as SS Kiautschou for the Hamburg America Line and as SS Princess Alice (sometimes spelled Prinzess Alice) for North German Lloyd. After the war she served as the United States Army transport ship USAT Princess Matoika. In post-war civilian service she was SS Princess Matoika until 1922, SS President Arthur until 1927, and SS City of Honolulu until she was scrapped in 1933. Built in 1900 for the German Far East mail routes, SS Kiautschou traveled between Hamburg and Far East ports for most of her Hamburg America Line career. In 1904, she was traded to competitor North German Lloyd for five freighters, and renamed SS Princess Alice. She sailed both transatlantic and Far East mail routes until the outbreak of World War I, when she was interned in the neutral port of Cebu in the Philippines. Seized by the U.S. in 1917, the newly renamed USS Princess Matoika carried thousands of U.S. troops to and from France in U.S. Navy service from 1918 to 1919. As an Army transport after that, she continued to return troops and repatriated the remains of Americans killed overseas in the war. In July 1920 she was a last-minute substitute to carry a large portion of the United States team to the 1920 Summer Olympics in Antwerp. From the perspective of the Olympic team, the trip was disastrous and a majority of the team members published a list of grievances and demands of the American Olympic Committee in an action known today as the Mutiny of the Matoika. (Full article...)

    USS Princess Matoika (ID-2290) under way in 1919

    USS Princess Matoika (ID-2290) was a transport ship for the United States Navy during World War I. Before the war, she was a Barbarossa-class ocean liner that sailed as SS Kiautschou for the Hamburg America Line and as SS Princess Alice (sometimes spelled Prinzess Alice) for North German Lloyd. After the war she served as the United States Army transport ship USAT Princess Matoika. In post-war civilian service she was SS Princess Matoika until 1922, SS President Arthur until 1927, and SS City of Honolulu until she was scrapped in 1933.

    Built in 1900 for the German Far East mail routes, SS Kiautschou traveled between Hamburg and Far East ports for most of her Hamburg America Line career. In 1904, she was traded to competitor North German Lloyd for five freighters, and renamed SS Princess Alice. She sailed both transatlantic and Far East mail routes until the outbreak of World War I, when she was interned in the neutral port of Cebu in the Philippines. Seized by the U.S. in 1917, the newly renamed USS Princess Matoika carried thousands of U.S. troops to and from France in U.S. Navy service from 1918 to 1919. As an Army transport after that, she continued to return troops and repatriated the remains of Americans killed overseas in the war. In July 1920 she was a last-minute substitute to carry a large portion of the United States team to the 1920 Summer Olympics in Antwerp. From the perspective of the Olympic team, the trip was disastrous and a majority of the team members published a list of grievances and demands of the American Olympic Committee in an action known today as the Mutiny of the Matoika. (Full article...)
  • Image 15 SMS Roon in the Kaiser Wilhelm Canal, c. 1910 SMS Roon was the lead ship of her class of armored cruisers built for the German Kaiserliche Marine (Imperial Navy) in the early 1900s as part of a major naval expansion program aimed at strengthening the fleet. The ship was named after Field Marshal Albrecht von Roon. She was built at the Kaiserliche Werft in Kiel, being laid down in August 1902, launched in June 1903, and commissioned in April 1906. The ship was armed with a main battery of four 21 cm (8.3 in) guns and had a top speed of 20.4 knots (37.8 km/h; 23.5 mph). Like many of the late armored cruisers, Roon was quickly rendered obsolescent by the advent of the battlecruiser; as a result, her career was limited. Roon served in I Scouting Group, the reconnaissance force of the High Seas Fleet, for the duration of her peacetime career, including several stints as the flagship of the group's deputy commander. During this period, the ship was occupied with training exercises and made several cruises in the Atlantic Ocean. In 1907, she visited the United States to represent Germany during the Jamestown Exposition. In September 1911 she was decommissioned and placed in reserve. (Full article...)

    SMS Roon in the Kaiser Wilhelm Canal, c. 1910

    SMS Roon was the lead ship of her class of armored cruisers built for the German Kaiserliche Marine (Imperial Navy) in the early 1900s as part of a major naval expansion program aimed at strengthening the fleet. The ship was named after Field Marshal Albrecht von Roon. She was built at the Kaiserliche Werft in Kiel, being laid down in August 1902, launched in June 1903, and commissioned in April 1906. The ship was armed with a main battery of four 21 cm (8.3 in) guns and had a top speed of 20.4 knots (37.8 km/h; 23.5 mph). Like many of the late armored cruisers, Roon was quickly rendered obsolescent by the advent of the battlecruiser; as a result, her career was limited.
    Roon served in I Scouting Group, the reconnaissance force of the High Seas Fleet, for the duration of her peacetime career, including several stints as the flagship of the group's deputy commander. During this period, the ship was occupied with training exercises and made several cruises in the Atlantic Ocean. In 1907, she visited the United States to represent Germany during the Jamestown Exposition. In September 1911 she was decommissioned and placed in reserve. (Full article...)
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This is a Featured article, which represents some of the best content on English Wikipedia.
A statue of Phan Đình Phùng located in center of the traffic circle facing the Chợ Lớn General Post Office, District 5, Ho Chi Minh City.

Phan Đình Phùng (Vietnamese: [faːn ɗîŋ̟ fûŋm]; 1847 – January 21, 1896) was a Vietnamese revolutionary who led rebel armies against French colonial forces in Vietnam. He was the most prominent of the Confucian court scholars involved in anti-French military campaigns in the 19th century and was cited after his death by 20th-century nationalists as a national hero. He was renowned for his uncompromising will and principles—on one occasion, he refused to surrender even after the French had desecrated his ancestral tombs and had arrested and threatened to kill his family.

Born into a family of mandarins from Hà Tĩnh Province, Phan continued his ancestors' traditions by placing first in the metropolitan imperial examinations in 1877. Phan quickly rose through the ranks under Emperor Tự Đức of the Nguyễn dynasty, gaining a reputation for his integrity and uncompromising stance against corruption. Phan was appointed as the Imperial Censor, a position that allowed him to criticise his fellow mandarins and even the emperor. As the head of the censorate, Phan's investigations led to the removal of many incompetent or corrupt mandarins. (Full article...)
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SMS Mainz (background) shortly before sinking in the Battle of Heligoland Bight
SMS Mainz (background) shortly before sinking in the Battle of Heligoland Bight
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