Operation Sportpalast (German: Sports Palace), also known as Unternehmen Nordmeer (German: Northern Sea), was a German naval raid between 6 and 13 March 1942 against two of the Allied Arctic convoys of the Second World War as they passed through the Norwegian Sea. It was conducted by the battleship Tirpitz, three destroyers and eight submarines. The German ships were unable to locate either of the convoys but sank a merchant vessel that was sailing independently. The Allies attempted to intercept the German force, also without success.

The operation was the first big German attack on the Arctic convoys to and from the Soviet Union and used warships that had been transferred to occupied Norway in early 1942. Tirpitz and her escorts sailed on 6 March. The Allies learned of this from decoded German radio signals, and the British Home Fleet attempted to locate and destroy the German force. This intelligence was also used to re-route the convoys to evade Tirpitz. The British located the German battleship on the morning of 9 March, by which time she was returning to Norway. An attack against Tirpitz by torpedo bombers flying from the aircraft carrier HMS Victorious failed and two British aircraft were shot down. The German ships returned to their base on 13 March. (Full article...)

Louis Alexander Mountbatten, 1st Marquess of Milford Haven (24 May 1854 – 11 September 1921), formerly Prince Louis Alexander of Battenberg, was a British naval officer and German prince related by marriage to the British royal family.

Although born in Austria, and brought up in Italy and Germany, Louis enrolled in the British Royal Navy at the age of fourteen. Queen Victoria and her son the Prince of Wales (later King Edward VII) occasionally intervened in his career: the Queen thought that there was "a belief that the Admiralty are afraid of promoting Officers who are Princes on account of the radical attacks of low papers and scurrilous ones". However, Louis welcomed assignments that provided opportunities for him to acquire the skills of war and to demonstrate to his superiors that he was serious about his naval career. Posts on royal yachts and tours arranged by Queen Victoria and Prince Edward actually impeded his progress, as his promotions were perceived as undeserved royal favours. (Full article...)

The 1st Cavalry Division of the Royal Yugoslav Army was established in 1921, soon after the creation of the Kingdom of Serbs, Croats and Slovenes, which became the Kingdom of Yugoslavia in 1929. In peacetime it consisted of two cavalry brigade headquarters commanding a total of four regiments. It was part of the Yugoslav 1st Army Group during the German-led World War II Axis invasion of Yugoslavia in April 1941, with a wartime organisation specifying one cavalry brigade headquarters commanding two or three regiments, and divisional-level combat and support units.

Along with the rest of the Royal Yugoslav Army, the 1st Cavalry Division began mobilising on 3 April 1941 following a coup d'état. Three days later, with mobilisation not complete, the Germans began an air campaign and a series of preliminary operations against the Yugoslav frontiers. By the end of the following day, the division's cavalry brigade headquarters and all of the division's cavalry regiments had been detached for duty with other formations of the 1st Army Group. The divisional headquarters and divisional-level units remained in the vicinity of Zagreb until 10 April, when they were given orders to establish a defensive line southeast of Zagreb along the Sava River, with infantry and artillery support. The division had only begun to deploy for this task when the German 14th Panzer Division captured Zagreb. The divisional headquarters and all attached units were then captured by armed Croat fifth column groups, or surrendered to German troops. (Full article...)

Thomas the Slav (Greek: Θωμᾶς, romanized: Thōmas, c. 760 – October 823) was a 9th-century Byzantine military commander, most notable for leading a wide-scale revolt in 821–23 against Emperor Michael II the Amorian (r. 820–829).

An army officer of Slavic origin from the Pontus region (now north-eastern Turkey), Thomas rose to prominence, along with the future emperors Michael II and Leo V the Armenian (r. 813–820), under the protection of general Bardanes Tourkos. After Bardanes' failed rebellion in 803, Thomas fell into obscurity until Leo V's rise to the throne, when Thomas was raised to a senior military command in central Asia Minor. After the murder of Leo and usurpation of the throne by Michael the Amorian, Thomas revolted, claiming the throne for himself. Thomas quickly secured support from most of the themes (provinces) and troops in Asia Minor, defeated Michael's initial counter-attack and concluded an alliance with the Abbasid Caliphate. After winning over the maritime themes and their ships as well, he crossed with his army to Europe and laid siege to Constantinople. The imperial capital withstood Thomas's attacks by land and sea, while Michael II called for help from the Bulgarian Khan Omurtag. Omurtag attacked Thomas's army, but although repelled, the Bulgarians inflicted heavy casualties on Thomas's men, who broke and fled when Michael took to the field a few months later. Thomas and his supporters sought refuge in Arcadiopolis, where he was soon blockaded by Michael's troops. In the end, Thomas's supporters surrendered him in exchange for a pardon, and he was executed. (Full article...)

The Second War of Scottish Independence broke out in 1332, when Edward Balliol led an English-backed invasion of Scotland. Balliol, the son of former Scottish king John Balliol, was attempting to make good his claim to the Scottish throne. He was opposed by Scots loyal to the occupant of the throne, eight-year-old David II. At the Battle of Dupplin Moor Balliol's force defeated a Scottish army ten times their size and Balliol was crowned king. Within three months David's partisans had regrouped and forced Balliol out of Scotland. He appealed to the English king, Edward III, who invaded Scotland in 1333 and besieged the important trading town of Berwick. A large Scottish army attempted to relieve it but was heavily defeated at the Battle of Halidon Hill. Balliol established his authority over most of Scotland, ceded to England the eight counties of south-east Scotland and did homage to Edward for the rest of the country as a fief.

As allies of Scotland via the Auld Alliance, the French were unhappy about an English expansion into Scotland and so covertly supported and financed David's loyalists. Balliol's allies fell out among themselves and he lost control of most of Scotland again by late 1334. In early 1335, the French attempted to broker a peace. However, the Scots were unable to agree on a position and Edward prevaricated while building a large army. He invaded in July and again overran most of Scotland. Tensions with France increased. Further French-sponsored peace talks failed in 1336; in May 1337, King Philip VI of France engineered a clear break between France and England, starting the Hundred Years' War. The Anglo-Scottish war became a subsidiary theatre of this larger Anglo-French war. Edward sent what troops he could spare to Scotland, in spite of which the English slowly lost ground in Scotland as they were forced to focus on the French theatre. Achieving his majority, David returned to Scotland from France in 1341; by 1342, the English had been cleared from north of the border. (Full article...)

The first homosexual movement thrived in Germany from the late nineteenth century until 1933. The movement began in Germany because of a confluence of factors, including the criminalization of sex between men (Paragraph 175) and the country's relatively lax censorship. German writers in the mid-nineteenth century coined the word homosexual and criticized its criminalization. In 1897, Magnus Hirschfeld founded the world's first homosexual organization, the Scientific-Humanitarian Committee, whose aim was to use science to improve public tolerance of homosexuality and repeal Paragraph 175. During the German Empire, the movement was restricted to the wealthy elite, but it greatly expanded in the aftermath of World War I and the German Revolution.

Reduced censorship and the growth of homosexual subcultures in German cities helped the movement to flourish during the Weimar Republic. The first publicly sold, mass-market periodicals intended for a gay, lesbian, or transvestite readership appeared after 1919, although they faced censorship lawsuits and bans on public sale after the 1926 Trash and Smut Law [de]. The first mass organizations for homosexuals, the German Friendship Society and the League for Human Rights, were founded in the aftermath of the war. These organizations emphasized human rights and respectability politics, and they excluded prostitutes and effeminate homosexual men, who were considered harmful to the movement's public image. The homosexual movement had limited success with the general public, in part because many Germans believed that homosexuality could be spread as a communicable disease. (Full article...)

Stanley Melbourne Bruce, 1st Viscount Bruce of Melbourne (15 April 1883 – 25 August 1967) was an Australian politician, statesman and businessman who served as the eighth prime minister of Australia from 1923 to 1929. He held office as the leader of the Nationalist Party, having previously served as the treasurer of Australia from 1921 to 1923.

Born into a briefly wealthy Melbourne family, Bruce studied at the University of Cambridge and played a leading role in his family's softgoods firm following the suicide of his father John Munro Bruce. He served on the front lines of the Gallipoli Campaign in World War I and returned to Australia wounded in 1917, becoming a spokesman for government recruitment efforts. He gained the attention of the Nationalist Party and prime minister Billy Hughes, who encouraged a political career. He was elected to the House of Representatives in 1918, becoming member of parliament (MP) for the seat of Flinders. He was appointed as treasurer in 1921, before replacing Hughes as prime minister in 1923. He established an anti-socialist coalition government with the agrarian Country Party, working closely with Country leader Earle Page in an arrangement that pioneered the modern Liberal–National coalition. (Full article...)

Edward Teach (or Thatch; c. 1680 – 22 November 1718), better known as Blackbeard, was an English pirate who operated around the West Indies and the eastern coast of Britain's North American colonies. Little is known about his early life, but he may have been a sailor on privateer ships during Queen Anne's War before he settled on the Bahamian island of New Providence, a base for Captain Benjamin Hornigold, whose crew Teach joined around 1716. Hornigold placed him in command of a sloop that he had captured, and the two engaged in numerous acts of piracy. Their numbers were boosted by the addition to their fleet of two more ships, one of which was commanded by Stede Bonnet, but Hornigold retired from piracy toward the end of 1717, taking two vessels with him.

Teach captured a French slave ship known as La Concorde, renamed her Queen Anne's Revenge, equipped her with 40 guns, and crewed her with over 300 men. He became a renowned pirate. His nickname derived from his thick black beard and fearsome appearance. He was reported to have tied lit fuses (slow matches) under his hat to frighten his enemies. He formed an alliance of pirates and blockaded the port of Charles Town, South Carolina, ransoming the port's inhabitants. He then ran Queen Anne's Revenge aground on a sandbar near Beaufort, North Carolina. He parted company with Stede Bonnet and settled in Bath, North Carolina, also known as Bath Town, where he accepted a royal pardon. However, he was soon back at sea, where he attracted the attention of Alexander Spotswood, the governor of Virginia. Spotswood arranged for a party of soldiers and sailors to capture him. On 22 November 1718, following a ferocious battle, Teach and several of his crew were killed by a small force of sailors led by Lieutenant Robert Maynard. (Full article...)

The Battle of Kaiapit was an action fought in 1943 between Australian and Japanese forces in New Guinea during the Markham and Ramu Valley – Finisterre Range campaign of World War II. Following the landings at Nadzab and at Lae, the Allies attempted to exploit their success with an advance into the upper Markham Valley, starting with Kaiapit. The Japanese intended to use Kaiapit to threaten the Allied position at Nadzab, and to create a diversion to allow the Japanese garrison at Lae time to escape.

The Australian 2/6th Independent Company flew in to the Markham Valley from Port Moresby in 13 USAAF C-47 Dakotas, making a difficult landing on a rough airstrip. Unaware that a much larger Japanese force was also headed for Kaiapit, the company attacked the village on 19 September to secure the area so that it could be developed into an airfield. The company then held it against a strong counter-attack. During two days of fighting the Australians defeated a larger Japanese force while suffering relatively few losses. (Full article...)

The Manhattan Project was a research and development program undertaken during World War II to produce the first nuclear weapons. It was led by the United States in collaboration with the United Kingdom and Canada.

From 1942 to 1946, the project was directed by Major General Leslie Groves of the U.S. Army Corps of Engineers. Nuclear physicist J. Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the bombs. The Army program was designated the Manhattan District, as its first headquarters were in Manhattan; the name gradually superseded the official codename, Development of Substitute Materials, for the entire project. The project absorbed its earlier British counterpart, Tube Alloys, and subsumed the program from the American civilian Office of Scientific Research and Development. (Full article...)

A hemmema (from Finnish "Hämeenmaa", Tavastia) was a type of warship built for the Swedish archipelago fleet and the Russian Baltic Fleet in the late 18th and early 19th centuries. The hemmema was initially developed for use against the Imperial Russian Navy in the Archipelago Sea and along the coasts of Svealand and Finland. It was designed by the prolific and innovative Swedish naval architect Fredrik Henrik af Chapman (1721–1808) in collaboration with Augustin Ehrensvärd (1710–1772), an artillery officer and later commander of the Swedish archipelago fleet. The hemmema was a specialized vessel for use in the shallow waters and narrow passages that surround the thousands of islands and islets extending from the Swedish capital of Stockholm into the Gulf of Finland.

The hemmema replaced the galleys that had made up the core of the Swedish archipelago fleets until the mid-18th century. Compared to galleys, the hemmema had a deeper draft and was slower under oars, but offered superior accommodation for the crew, carried more stores, was more seaworthy and had roughly ten times as many heavy guns. It could be propelled by either sails or oars but was still smaller and more maneuverable than most sailing warships, which made it suitable for operations in confined waters. (Full article...)

The 7th Army was a Royal Yugoslav Army formation raised prior to the German-led Axis invasion of Yugoslavia in April 1941, during World War II. It consisted of two divisions, two brigade-strength mountain detachments, and a brigade-strength infantry detachment. It formed part of the 1st Army Group, and was responsible for the defence of Yugoslavia's north-western frontier with Italy and Germany. Like all Yugoslav formations at the time, the 7th Army had serious deficiencies in both mobility and firepower.

Despite concerns over a possible Axis invasion, orders for the general mobilisation of the Royal Yugoslav Army were not issued by the government until 3 April 1941, not to provoke Germany any further following the military coup d'état and precipitate war. When the invasion commenced on 6 April, the 7th Army was only partially mobilised, and on the first day the Germans seized several mountain passes and bridges over the Drava river. Slovene politicians formed a National Council of Slovenia with the intent of separating from Yugoslavia, and on the right flank of the 7th Army, the 4th Army was seriously weakened by Croat fifth column activities within its major units and higher headquarters from the outset. This alarmed the 7th Army commander, Divizijski đeneral Dušan Trifunović, but he was not permitted to withdraw from the border areas until the night of 7/8 April, and this was followed by the German capture of Maribor on 8 April as they continued to expand their bridgeheads, supported by the Luftwaffe. (Full article...)

Whaam! is a 1963 diptych painting by the American artist Roy Lichtenstein. It is one of the best-known works of pop art, and among Lichtenstein's most important paintings. Whaam! was first exhibited at the Leo Castelli Gallery in New York City in 1963, and purchased by the Tate Gallery, London, in 1966. It has been on permanent display at Tate Modern since 2006.

The left-hand panel shows a fighter plane firing a rocket that, in the right-hand panel, hits a second plane which explodes in flames. Lichtenstein adapted the image from several comic-book panels, with the primary source being a panel illustrated by Irv Novick from a 1962 war comic book. Lichtenstein transformed the source by presenting it as a diptych while altering the relationship of the graphical and narrative elements. Whaam! is regarded for the temporal, spatial and psychological integration of its two panels. The painting's title is integral to the action and impact of the painting, and displayed in large onomatopoeia in the right panel. (Full article...)

USS West Bridge (ID-2888) was a Design 1013 cargo ship in the United States Navy during World War I. She was begun as War Topaz for the British Government but was completed as West Bridge (though referred to in some publications under the spelling Westbridge). After being decommissioned from the Navy, the ship returned to civilian service as West Bridge, but was renamed Barbara Cates, and Pan Gulf over the course of her commercial career under American registry.

West Bridge was one of the West ships, a series of steel-hulled cargo ships built for the United States Shipping Board (USSB) on the West Coast of the United States. She was launched in April 1918 and delivered to the U.S. Navy upon completion in May. After commissioning, USS West Bridge sailed from the Pacific Northwest to the East Coast of the United States and joined a convoy of cargo ships headed to France in August. After the ship suffered an engine breakdown at sea the convoy was attacked by two German submarines and West Bridge was torpedoed and abandoned. A salvage crew from the American destroyer Smith boarded her the following day, and, working with four tugs dispatched from France, successfully brought the ship into port. Four men received the Navy Cross for their efforts. (Full article...)

Sir Charles Edward Inglis (/ˈɪŋɡəlz/; 31 July 1875 – 19 April 1952) was a British civil engineer. The son of a medical doctor, he was educated at Cheltenham College and won a scholarship to King's College, Cambridge, where he would later forge a career as an academic. Inglis spent a two-year period with the engineering firm run by John Wolfe-Barry before he returned to King's College as a lecturer. Working with Professors James Alfred Ewing and Bertram Hopkinson, he made several important studies into the effects of vibration on structures and defects on the strength of plate steel.

Inglis served in the Royal Engineers during the First World War and invented the Inglis Bridge, a reusable steel bridging system – the precursor to the more famous Bailey bridge of the Second World War. In 1916 he was placed in charge of bridge design and supply at the War Office and, with Giffard Le Quesne Martel, pioneered the use of temporary bridges with tanks. Inglis retired from military service in 1919 and was appointed an Officer of the Order of the British Empire. He returned to Cambridge University after the war as a professor and head of the Engineering Department. Under his leadership, the department became the largest in the university and one of the best regarded engineering schools in the world. Inglis retired from the department in 1943. (Full article...)