Arctic convoys of World War II

Operation Barbarossa was the invasion of the Soviet Union by Nazi Germany and many of its Axis allies, starting on Sunday, 22 June 1941, during the Second World War. It was the largest land offensive in human history, with over 10 million combatants taking part. The operation, code-named after Frederick Barbarossa, a 12th-century Holy Roman emperor and German king, put into action Nazi Germany's ideological goal of conquering the western Soviet Union to repopulate it with Germans. The German Generalplan Ost aimed to use some of the conquered people as forced labour for the Axis war effort while acquiring the oil reserves of the Caucasus as well as the agricultural resources of various Soviet territories including Ukraine and Byelorussia. Their ultimate goal was to create more Lebensraum for Germany, and the eventual extermination of the indigenous Slavic peoples by mass deportation to Siberia, Germanisation, enslavement, and genocide.

The Anglo-Soviet Agreement was a formal military alliance that was signed by the United Kingdom and the Soviet Union against Nazi Germany on July 12, 1941, shortly after the beginning of Operation Barbarossa, the German invasion of the Soviet Union. Both powers pledged to assist each other and not to make a separate peace with Germany. The military alliance was to be valid until the end of World War II. The two founding principles of the agreement of a commitment of mutual assistance and renunciation of a separate peace formed the basis of the later Declaration by United Nations.

The Axis powers, originally called the Rome–Berlin Axis, was a military coalition that initiated World War II and fought against the Allies. Its principal members were Nazi Germany, the Kingdom of Italy, and the Empire of Japan. The Axis were united in their opposition to the Allies, but otherwise lacked comparable coordination and ideological cohesion.

The Anglo-Soviet invasion of Iran or Anglo-Soviet invasion of Persia was the joint invasion of the neutral Imperial State of Iran by the United Kingdom and the Soviet Union in August 1941. The invasion, code name Operation Countenance, was largely unopposed by the numerically and technologically outmatched Iranian forces. The multi-pronged coordinated invasion took place along Iran's borders with the Kingdom of Iraq, Azerbaijan SSR, and Turkmen SSR, with fighting beginning on 25 August and ending on 31 August when the Iranian government formally agreed to surrender, having already agreed to a ceasefire on 30 August.

The Allies, formally referred to as the United Nations from 1942, were an international military coalition formed during the Second World War (1939–1945) to oppose the Axis powers, led by Nazi Germany, Imperial Japan, and Fascist Italy. Its principal members by the end of 1941 were the United Kingdom, United States, Soviet Union, and China.

Japan's attack on Pearl Harbor took place on December 7, 1941. The U.S. military suffered 18 ships damaged or sunk, and 2,400 people were killed. Its most significant consequence was the entrance of the United States into World War II. The US had previously been officially neutral but subsequently entered the Pacific War, the Battle of the Atlantic and the European theatre of war. Following the attack, the US interned 120,000 Japanese Americans, 11,000 German Americans, and 3,000 Italian Americans

Lend-Lease, formally the Lend-Lease Act and introduced as An Act to Promote the Defense of the United States, was a policy under which the United States supplied the United Kingdom, the Soviet Union, France, China, and other Allied nations with food, oil, and materiel between 1941 and 1945. The aid was given for free on the basis that such help was essential for the defense of the United States.

HMS Sheffield was one of the Southampton sub class of the Town-class cruisers of the Royal Navy during the Second World War. She took part in actions against several major German warships. Unlike most Royal Navy ships of her time, her fittings were constructed from stainless steel instead of the more traditional brass. This was an attempt to reduce the amount of cleaning required on the part of the crew. Her nickname, the "Shiny Sheff", stemmed from this. A prototype radar system was placed into service in August 1938 on the Sheffield. It was the first vessel in the Royal Navy to be so equipped.

Operation Dervish was the first of the Arctic Convoys of the Second World War by which the Western Allies supplied material to the Soviet Union against Nazi Germany. Included in the convoy was the personnel and equipment of an RAF Wing, for the air defence of the Russian ports, several civilians and diplomatic missions.

The Arctic is a polar region located at the northernmost part of Earth. The Arctic consists of the Arctic Ocean, adjacent seas, and parts of Canada, Danish Realm (Greenland), northern Finland (Lapland), Iceland, northern Norway, Russia, northernmost Sweden and the United States (Alaska). Land within the Arctic region has seasonally varying snow and ice cover, with predominantly treeless permafrost containing tundra. Arctic seas contain seasonal sea ice in many places.

PQ 17 was the code name for an Allied Arctic convoy during the Second World War. On 27 June 1942, the ships sailed from Hvalfjörður, Iceland, for the port of Arkhangelsk in the Soviet Union. The convoy was located by German forces on 1 July, after which it was shadowed continuously and attacked. The First Sea Lord Admiral Dudley Pound, acting on information that German surface units, including the German battleship Tirpitz, were moving to intercept, ordered the covering force built around the Allied battleships HMS Duke of York and the USS Washington away from the convoy and told the convoy to scatter. Because of vacillation by Oberkommando der Wehrmacht, the Tirpitz raid never materialised. The convoy was the first large joint Anglo-American naval operation under British command; in Churchill's view this encouraged a more careful approach to fleet movements.

Convoy PQ 18 was an Arctic convoy of forty Allied freighters from Scotland and Iceland to Arkhangelsk in the Soviet Union in the war against Nazi Germany. The convoy departed Loch Ewe, Scotland on 2 September 1942, rendezvoused with more ships and escorts at Iceland and arrived at Arkhangelsk on 21 September. An exceptionally large number of escorts was provided by the Royal Navy in Operation EV, including the first escort carrier to accompany an Arctic convoy. Detailed information on German intentions was provided by the code breakers at Bletchley Park and elsewhere, through Ultra signals decrypts and eavesdropping on Luftwaffe wireless communications.

Hvalfjörður is situated in the west of Iceland between Mosfellsbær and Akranes. The fjord is approximately 30 km long and 5 km wide.

Loch Ewe is a sea loch in the region of Wester Ross in the Northwest Highlands of Scotland. The shores are inhabited by a traditionally Gàidhlig-speaking people living in or sustained by crofting villages, the most notable of which, situated on the north-eastern shore, is the Aultbea settlement.

Tirpitz was the second of two Bismarck-class battleships built for Nazi Germany's Kriegsmarine (navy) prior to and during the Second World War. Named after Grand Admiral Alfred von Tirpitz, the architect of the Kaiserliche Marine, the ship was laid down at the Kriegsmarinewerft Wilhelmshaven in November 1936 and her hull was launched two and a half years later. Work was completed in February 1941, when she was commissioned into the German fleet. Like her sister ship, Bismarck, Tirpitz was armed with a main battery of eight 38-centimetre (15 in) guns in four twin turrets. After a series of wartime modifications she was 2000 tonnes heavier than Bismarck, making her the heaviest battleship ever built by a European navy.

The Luftwaffe was the aerial-warfare branch of the German Wehrmacht before and during World War II. Germany's military air arms during World War I, the Luftstreitkräfte of the Imperial Army and the Marine-Fliegerabteilung of the Imperial Navy, had been disbanded in May 1920 in accordance with the terms of the 1919 Treaty of Versailles which banned Germany from having any air force.

The Kriegsmarine was the navy of Germany from 1935 to 1945. It superseded the Imperial German Navy of the German Empire (1871–1918) and the inter-war Reichsmarine (1919–1935) of the Weimar Republic. The Kriegsmarine was one of three official branches, along with the Heer and the Luftwaffe, of the Wehrmacht, the German armed forces from 1935 to 1945.

Drift ice, also called brash ice, is sea ice that is not attached to the shoreline or any other fixed object. Unlike fast ice, which is "fastened" to a fixed object, drift ice is carried along by winds and sea currents, hence its name. When drift ice is driven together into a large single mass, it is called pack ice. Wind and currents can pile up that ice to form ridges up to dozens of metres in thickness. These represent a challenge for icebreakers and offshore structures operating in cold oceans and seas.

Hvalfjörður is situated in the west of Iceland between Mosfellsbær and Akranes. The fjord is approximately 30 km long and 5 km wide.

Arkhangelsk, also known in English as Archangel and Archangelsk, is a city and the administrative center of Arkhangelsk Oblast, Russia. It lies on both banks of the Northern Dvina near its mouth into the White Sea. The city spreads for over 40 kilometres (25 mi) along the banks of the river and numerous islands of its delta. Arkhangelsk was the chief seaport of medieval and early modern Russia until 1703, when it was replaced by the newly-founded Saint Petersburg.

A merchant ship, merchant vessel, trading vessel, or merchantman is a watercraft that transports cargo or carries passengers for hire. This is in contrast to pleasure craft, which are used for personal recreation, and naval ships, which are used for military purposes.

HMS Halcyon was the lead ship in her class of minesweepers built for the Royal Navy in the 1930s. The vessel was launched on 20 December 1933 and was used as a convoy escort and during the landing operations during the Invasion of Normandy during World War II. The ship was sold for scrapping in 1950.

In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy, or battle group and defend them against powerful short-range attackers. They were originally developed in 1885 by Fernando Villaamil for the Spanish Navy as a defense against torpedo boats, and by the time of the Russo-Japanese War in 1904, these "torpedo boat destroyers" (TBDs) were "large, swift, and powerfully armed torpedo boats designed to destroy other torpedo boats". Although the term "destroyer" had been used interchangeably with "TBD" and "torpedo boat destroyer" by navies since 1892, the term "torpedo boat destroyer" had been generally shortened to simply "destroyer" by nearly all navies by the First World War.

HMS Electra was a one of nine E-class destroyers built for the Royal Navy during the 1930s. Sunk in the Battle of the Java Sea, Electra was a witness to many naval battles, including the Battle of the Denmark Strait and the sinking of Prince of Wales and Repulse. The ship's wreck was discovered in 2003 and had been badly damaged by illegal salvagers by 2016.

HMS Active, the tenth Active, launched in 1929, was an A-class destroyer. She served in the Second World War, taking part in the sinking of four submarines. She was broken up in 1947.

HMS Impulsive was an I-class destroyer built for the Royal Navy during the 1930s. She saw service in World War II before being scrapped in 1946. She has been the only ship of the Navy to bear this name.

Naval trawlers are vessels built along the lines of a fishing trawler but fitted out for naval purposes; they were widely used during the First and Second World Wars. Some—known in the Royal Navy as "Admiralty trawlers"— were purpose-built to naval specifications, others adapted from civilian use. Fishing trawlers were particularly suited for many naval requirements because they were robust vessels designed to work heavy trawls in all types of weather, and had large clear working decks. A minesweeper could be created by replacing the trawl with a mine sweep. Adding depth charge racks on the deck, ASDIC sonar below, and a 3-inch (76 mm) or 4-inch (102 mm) gun in the bow equipped the trawler for anti-submarine duties.

Convoy PQ 16 was an Arctic convoy of British, United States and Allied ships from Iceland to Murmansk and Archangelsk in the Soviet Union during the Second World War. The convoy was the largest yet and was provided with a considerable number of escorts and submarines. QP 12, a return convoy, sailed on the same day

A crane vessel, crane ship or floating crane is a ship with a crane specialized in lifting heavy loads, typically exceeding 1,500 t for modern ships. The largest crane vessels are used for offshore construction.

Hvalfjörður is situated in the west of Iceland between Mosfellsbær and Akranes. The fjord is approximately 30 km long and 5 km wide.

Arkhangelsk, also known in English as Archangel and Archangelsk, is a city and the administrative center of Arkhangelsk Oblast, Russia. It lies on both banks of the Northern Dvina near its mouth into the White Sea. The city spreads for over 40 kilometres (25 mi) along the banks of the river and numerous islands of its delta. Arkhangelsk was the chief seaport of medieval and early modern Russia until 1703, when it was replaced by the newly-founded Saint Petersburg.

Convoy PQ 5 was the sixth of the Arctic Convoys of World War II by which the Western Allies supplied material aid to the Soviet Union in its fight with Nazi Germany. The Convoy sailed from Hvalfjord, Iceland on 27 November 1941 and arrived at Archangelsk on 13 December 1941.

Convoy PQ 8 was an Arctic convoy of the Western Allies to aid the Soviet Union during the Second World War. The convoy left Iceland on 8 January 1942. On 12 January the convoy had to turn south to avoid ice; the weather was calm, visibility was exceptional, with a short period of twilight around noon. and arrived in Murmansk nine days later.

The Hawker Hurricane is a British single-seat fighter aircraft of the 1930s–40s which was designed and predominantly built by Hawker Aircraft Ltd. for service with the Royal Air Force (RAF). It was overshadowed in the public consciousness by the Supermarine Spitfire during the Battle of Britain in 1940, but the Hurricane inflicted 60% of the losses sustained by the Luftwaffe in the campaign, and fought in all the major theatres of the Second World War.

Operation Archery, also known as the Måløy Raid, was a British Combined Operations raid during World War II against German positions on the island of Vågsøy, Norway, on 27 December 1941.

Tirpitz was the second of two Bismarck-class battleships built for Nazi Germany's Kriegsmarine (navy) prior to and during the Second World War. Named after Grand Admiral Alfred von Tirpitz, the architect of the Kaiserliche Marine, the ship was laid down at the Kriegsmarinewerft Wilhelmshaven in November 1936 and her hull was launched two and a half years later. Work was completed in February 1941, when she was commissioned into the German fleet. Like her sister ship, Bismarck, Tirpitz was armed with a main battery of eight 38-centimetre (15 in) guns in four twin turrets. After a series of wartime modifications she was 2000 tonnes heavier than Bismarck, making her the heaviest battleship ever built by a European navy.

The Channel Dash was a German naval operation during the Second World War. A Kriegsmarine squadron comprising the two Scharnhorst-class battleships, the heavy cruiser Prinz Eugen and their escorts was evacuated from Brest in Brittany to German ports. Scharnhorst and Gneisenau had arrived in Brest on 22 March 1941 after the success of Operation Berlin in the Atlantic. More raids were planned and the ships were refitted at Brest. The ships were a threat to Allied trans-Atlantic convoys and RAF Bomber Command attacked them from 30 March 1941. Gneisenau was hit on 6 April 1941 and Scharnhorst on 24 July 1941, after dispersal to La Pallice. In late 1941, Adolf Hitler ordered the Oberkommando der Marine to plan an operation to return the ships to German bases against a British invasion of Norway. The short route up the English Channel was preferred to a detour around the British Isles for surprise and air cover by the Luftwaffe and on 12 January 1942, Hitler gave orders for the operation.

In naval warfare, a "fleet in being" is a naval force that extends a controlling influence without ever leaving port. Were the fleet to leave port and face the enemy, it might lose in battle and no longer influence the enemy's actions, but while it remains safely in port, the enemy is forced to continually deploy forces to guard against it. A "fleet in being" can be part of a sea denial doctrine, but not one of sea control.

Gneisenau was a German capital ship, alternatively described as a battleship and battlecruiser, of Nazi Germany's Kriegsmarine. She was the second vessel of her class, which included her sister ship, Scharnhorst. The ship was built at the Deutsche Werke dockyard in Kiel; she was laid down on 6 May 1935 and launched on 8 December 1936. Completed in May 1938, the ship was armed with a main battery of nine 28 cm (11 in) C/34 guns in three triple turrets. Plans were approved, once construction had started, to replace these weapons with six 38 cm (15 in) SK C/34 guns in twin turrets, but as this would involve a lot of redesign, construction continued with the lower calibre guns. The intent was to make the upgrade in the winter of 1940–41, but the outbreak of World War II stopped this.

Scharnhorst was a German capital ship, alternatively described as a battleship or battlecruiser, of Nazi Germany's Kriegsmarine. She was the lead ship of her class, which included her sister ship Gneisenau. The ship was built at the Kriegsmarinewerft dockyard in Wilhelmshaven; she was laid down on 15 June 1935 and launched a year and four months later on 3 October 1936. Completed in January 1939, the ship was armed with a main battery of nine 28 cm (11 in) C/34 guns in three triple turrets. Plans to replace these weapons with six 38 cm (15 in) SK C/34 guns in twin turrets were never carried out.

The Mid-Atlantic gap is a geographical term applied to an undefended area beyond the reach of land-based RAF Coastal Command antisubmarine (A/S) aircraft during the Battle of the Atlantic in the Second World War. It is frequently known as The Black Pit, as well as the Atlantic Gap, Air Gap, Greenland Gap, or just "the Gap". This resulted in heavy merchant shipping losses to U-boats. The gap was eventually closed in May 1943, as growing numbers of VLR Liberators and escort carriers became available, and as basing problems were addressed.

Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of Norway. Bouvet Island, located in the Subantarctic, is a dependency of Norway; it also lays claims to the Antarctic territories of Peter I Island and Queen Maud Land. The capital and largest city in Norway is Oslo.

In physical geography, a fjord or fiord is a long, narrow inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Antarctica, British Columbia, Chile, Denmark, Germany, Greenland, the Faroe Islands, Montenegro, Iceland, Ireland, Kamchatka, the Kerguelen Islands, Labrador, Newfoundland, New Zealand, Norway, Novaya Zemlya, Nunavut, Quebec, the Patagonia region of Argentina and Chile, Russia, South Georgia Island, Tasmania, Scotland and Washington state. Norway's coastline is estimated to be 29,000 km (18,000 mi) long with its nearly 1,200 fjords, but only 2,500 km (1,600 mi) long excluding the fjords.

The Kriegsmarine was the navy of Germany from 1935 to 1945. It superseded the Imperial German Navy of the German Empire (1871–1918) and the inter-war Reichsmarine (1919–1935) of the Weimar Republic. The Kriegsmarine was one of three official branches, along with the Heer and the Luftwaffe, of the Wehrmacht, the German armed forces from 1935 to 1945.

The Battle of the Barents Sea was a World War II naval engagement on 31 December 1942 between warships of the German Navy (Kriegsmarine) and British ships escorting convoy JW 51B to Kola Inlet in the USSR. The action took place in the Barents Sea north of North Cape, Norway. The German raiders' failure to inflict significant losses on the convoy infuriated Hitler, who ordered that German naval strategy would henceforth concentrate on the U-boat fleet rather than surface ships.

Ultra was the designation adopted by British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School (GC&CS) at Bletchley Park. Ultra eventually became the standard designation among the western Allies for all such intelligence. The name arose because the intelligence obtained was considered more important than that designated by the highest British security classification then used and so was regarded as being Ultra Secret. Several other cryptonyms had been used for such intelligence.

Bletchley Park is an English country house and estate in Bletchley, Milton Keynes (Buckinghamshire) that became the principal centre of Allied code-breaking during the Second World War. The mansion was constructed during the years following 1883 for the financier and politician Sir Herbert Leon in the Victorian Gothic, Tudor, and Dutch Baroque styles, on the site of older buildings of the same name.

Operation Archery, also known as the Måløy Raid, was a British Combined Operations raid during World War II against German positions on the island of Vågsøy, Norway, on 27 December 1941.

Operation Anklet was the codename given to a British Commando raid during the Second World War. The raid on the Lofoten Islands was carried out in December 1941, by 300 men from No. 12 Commando and the Norwegian Independent Company 1. The landing party was supported by 22 ships from three navies.

Eavesdropping is the act of secretly or stealthily listening to the private conversation or communications of others without their consent in order to gather information.

HMS Trident was a British T class submarine built by Cammell Laird, Birkenhead. She was laid down on 12 January 1937 and was commissioned on 1 October 1939. HMS Trident was part of the first group of T class submarines.

HMS Duke of York was a King George V-class battleship of the Royal Navy. Laid down in May 1937, the ship was constructed by John Brown and Company at Clydebank, Scotland, and commissioned into the Royal Navy on 4 November 1941, subsequently seeing combat service during the Second World War.

HMS Ulysses was the debut novel by Scottish author Alistair MacLean. Originally published in 1955, it was also released by Fontana Books in 1960. MacLean's experiences in the Royal Navy during World War II provided the background and the Arctic convoys to Murmansk provided the basis for the story, which was written at a publisher's request after he'd won a short-story competition the previous year.

Alistair Stuart MacLean was a Scottish novelist who wrote popular thrillers and adventure stories. Many of his novels have been adapted to film, most notably The Guns of Navarone (1957) and Ice Station Zebra (1963). In the late 1960s, encouraged by film producer Elliott Kastner, MacLean began to write original screenplays, concurrently with an accompanying novel. The most successful was the first of these, the 1968 film Where Eagles Dare, which was also a bestselling novel. MacLean also published two novels under the pseudonym Ian Stuart. His books are estimated to have sold over 150 million copies, making him one of the best-selling fiction authors of all time.

Jan de Hartog was a Dutch playwright, novelist and occasional social critic who moved to the United States in the early 1960s and became a Quaker.

Pacifism is the opposition or resistance to war, militarism or violence. Pacifists generally reject theories of Just War. The word pacifism was coined by the French peace campaigner Émile Arnaud and adopted by other peace activists at the tenth Universal Peace Congress in Glasgow in 1901. A related term is ahimsa, which is a core philosophy in Indian religions such as Hinduism, Buddhism, and Jainism. While modern connotations are recent, having been explicated since the 19th century, ancient references abound.

Valentin Savvich Pikul was a popular and prolific Soviet historical novelist of Ukrainian-Russian heritage. He lived and worked in Riga.

PQ 17 was the code name for an Allied Arctic convoy during the Second World War. On 27 June 1942, the ships sailed from Hvalfjörður, Iceland, for the port of Arkhangelsk in the Soviet Union. The convoy was located by German forces on 1 July, after which it was shadowed continuously and attacked. The First Sea Lord Admiral Dudley Pound, acting on information that German surface units, including the German battleship Tirpitz, were moving to intercept, ordered the covering force built around the Allied battleships HMS Duke of York and the USS Washington away from the convoy and told the convoy to scatter. Because of vacillation by Oberkommando der Wehrmacht, the Tirpitz raid never materialised. The convoy was the first large joint Anglo-American naval operation under British command; in Churchill's view this encouraged a more careful approach to fleet movements.

The Persian Corridor was a supply route through Iran into Soviet Azerbaijan by which British aid and American Lend-Lease supplies were transferred to the Soviet Union during World War II. Of the 17.5 million long tons of U.S. Lend-Lease aid provided to the Soviet Union, 7.9 million long tons (45%) were sent through Iran.

The attack on Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the U.S. naval base at Pearl Harbor in Honolulu, Territory of Hawaii, just before 8:00 a.m. on Sunday, December 7, 1941. The United States was a neutral country at the time; the attack led to its formal entry into World War II the next day. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning.

The Bering Strait is a strait between the Pacific and Arctic oceans, separating the Chukchi Peninsula of the Russian Far East from the Seward Peninsula of Alaska. The present Russia-United States maritime boundary is at 168° 58' 37" W longitude, slightly south of the Arctic Circle at about 65° 40' N latitude. The Strait is named after Vitus Bering, a Danish explorer in the service of the Russian Empire.

The Northern Sea Route (NSR) is a shipping route officially defined by Russian legislation as lying east of Novaya Zemlya and specifically running along the Russian Arctic coast from the Kara Sea, along Siberia, to the Bering Strait.

An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships, it may also refer to smaller vessels, such as the icebreaking boats that were once used on the canals of the United Kingdom.

ALSIB was the Soviet Union portion of the Alaska-Siberian air road receiving Lend-Lease aircraft from the Northwest Staging Route. Aircraft manufactured in the United States were flown over this route for World War II combat service on the Eastern Front.