44 relations: Allies of World War I, Allies of World War II, Baltic Sea, Baltic Sea campaigns (1939–45), Baralong incidents, Battle of the Atlantic, Blockade, Brazil, Cargo ship, Casus belli, Commerce raiding, Defensively equipped merchant ship, Dorling Kindersley, Eastern Front (World War II), Henning von Holtzendorff, Karl Dönitz, Laconia incident, Laconia Order, Law of war, List of ships sunk by submarines by death toll, London Declaration concerning the Laws of Naval War, London Naval Treaty, Naval warfare, Neutral country, Pacific War, Prize (law), Q-ship, RMS Lusitania, Soviet Union, SS Arabic (1902), Submarine, Submarine warfare, Sussex pledge, Tanker (ship), Tonnage war, Tsushima Maru, U-boat, U-boat Campaign (World War I), United Kingdom, United States, War Order No. 154, World War I, World War II, Zimmermann Telegram.
The Allies of World War I, or Entente Powers, were the countries that opposed the Central Powers in the First World War.
The Allies of World War II, called the United Nations from the 1 January 1942 declaration, were the countries that together opposed the Axis powers during the Second World War (1939–1945).
The Baltic Sea is a sea of the Atlantic Ocean, enclosed by Scandinavia, Finland, Estonia, Latvia, Lithuania, Russia, Poland, Germany and the North and Central European Plain.
The Baltic Sea Campaigns were conducted by Axis and Allied naval forces in the Baltic Sea, its coastal regions, and the Gulf of Finland during World War II.
The Baralong incidents were naval engagements of the First World War in August and September 1915, involving the Royal Navy Q-ship, later renamed HMS Wyandra, and two German U-boats.
The Battle of the Atlantic was the longest continuous military campaign in World War II, running from 1939 to the defeat of Germany in 1945.
A blockade is an effort to cut off supplies, war material or communications from a particular area by force, either in part or totally.
Brazil (Brasil), officially the Federative Republic of Brazil (República Federativa do Brasil), is the largest country in both South America and Latin America.
A cargo ship or freighter ship is any sort of ship or vessel that carries cargo, goods, and materials from one port to another.
Casus belli is a Latin expression meaning "an act or event that provokes or is used to justify war" (literally, "a case of war").
Commerce raiding is a form of naval warfare used to destroy or disrupt logistics of the enemy on the open sea by attacking its merchant shipping, rather than engaging its combatants or enforcing a blockade against them.
Defensively equipped merchant ship (DEMS) was an Admiralty Trade Division program established in June 1939, to arm 5,500 British merchant ships with an adequate defence against enemy submarines and aircraft.
Dorling Kindersley (DK) is a British multinational publishing company specializing in illustrated reference books for adults and children in 62 languages.
The Eastern Front of World War II was a theatre of conflict between the European Axis powers and co-belligerent Finland against the Soviet Union, Poland and other Allies, which encompassed Central Europe, Eastern Europe, Northeast Europe (Baltics), and Southeast Europe (Balkans) from 22 June 1941 to 9 May 1945.
Henning von Holtzendorff (January 9, 1853 – June 7, 1919) was a German admiral during World War I, who became famous for his December 1916 memo about unrestricted submarine warfare against the United Kingdom.
Grand Admiral Karl Dönitz (sometimes spelled Doenitz;; 16 September 1891 24 December 1980) was a German admiral who played a major role in the naval history of World War II.
The Laconia incident was a series of events surrounding the sinking of a British troopship in the Atlantic Ocean during World War II and an attack on the subsequent rescue attempts.
The Laconia Order (Laconia-Befehl) was issued by German Grand Admiral (Großadmiral) Karl Dönitz during World War II as a result of the Laconia incident, forbidding the rescue of Allied survivors.
The law of war is a legal term of art which refers to the aspect of public international law concerning acceptable justifications to engage in war (jus ad bellum) and the limits to acceptable wartime conduct (jus in bello or international humanitarian law).
Self-propelled torpedoes dramatically increased effectiveness of submarine warships.
The London Declaration concerning the Laws of Naval War is an international code of maritime law, especially as it relates to wartime activities, proposed in 1909 at the London Naval Conference by the leading European naval powers, the United States and the Japan, after a multinational conference that occurred in 1908 in London.
The Treaty for the Limitation and Reduction of Naval Armament, commonly known as the London Naval Treaty, was an agreement between the United Kingdom, Japan, France, Italy and the United States, signed on 22 April 1930, which regulated submarine warfare and limited naval shipbuilding.
Naval warfare is combat in and on the sea, the ocean, or any other battlespace involving major body of water such as a large lake or wide river.
A neutral country is a state, which is either neutral towards belligerents in a specific war, or holds itself as permanently neutral in all future conflicts (including avoiding entering into military alliances such as NATO).
The Pacific War, sometimes called the Asia-Pacific War, was the theater of World War II that was fought in the Pacific and Asia. It was fought over a vast area that included the Pacific Ocean and islands, the South West Pacific, South-East Asia, and in China (including the 1945 Soviet–Japanese conflict). The Second Sino-Japanese War between the Empire of Japan and the Republic of China had been in progress since 7 July 1937, with hostilities dating back as far as 19 September 1931 with the Japanese invasion of Manchuria. However, it is more widely accepted that the Pacific War itself began on 7/8 December 1941, when Japan invaded Thailand and attacked the British possessions of Malaya, Singapore, and Hong Kong as well as the United States military and naval bases in Hawaii, Wake Island, Guam and the Philippines. The Pacific War saw the Allies pitted against Japan, the latter briefly aided by Thailand and to a much lesser extent by the Axis allied Germany and Italy. The war culminated in the atomic bombings of Hiroshima and Nagasaki, and other large aerial bomb attacks by the Allies, accompanied by the Soviet declaration of war and invasion of Manchuria on 9 August 1945, resulting in the Japanese announcement of intent to surrender on 15 August 1945. The formal surrender of Japan ceremony took place aboard the battleship in Tokyo Bay on 2 September 1945. Japan's Shinto Emperor was forced to relinquish much of his authority and his divine status through the Shinto Directive in order to pave the way for extensive cultural and political reforms. After the war, Japan lost all rights and titles to its former possessions in Asia and the Pacific, and its sovereignty was limited to the four main home islands.
Prize is a term used in admiralty law to refer to equipment, vehicles, vessels, and cargo captured during armed conflict.
Q-ships, also known as Q-boats, decoy vessels, special service ships, or mystery ships, were heavily armed merchant ships with concealed weaponry, designed to lure submarines into making surface attacks.
RMS Lusitania was a British ocean liner and briefly the world's largest passenger ship.
The Soviet Union, officially the Union of Soviet Socialist Republics (USSR) was a socialist state in Eurasia that existed from 1922 to 1991.
SS Arabic was a British-registered ocean liner that entered service in 1903 for the White Star Line.
A submarine (or simply sub) is a watercraft capable of independent operation underwater.
Submarine warfare is one of the four divisions of underwater warfare, the others being anti-submarine warfare, mine warfare and mine countermeasures.
The Sussex Pledge was a promise made by Germany to the United States in 1916, during World War I before the latter entered the war.
A tanker (or tank ship or tankship) is a ship designed to transport or store liquids or gases in bulk.
A tonnage war is a military strategy aimed at merchant shipping.
Tsushima Maru (対馬丸) was a Japanese passenger/cargo ship that was sunk by the submarine USS ''Bowfin'' during World War II, while carrying hundreds of schoolchildren from Okinawa to Kagoshima.
U-boat is an anglicised version of the German word U-Boot, a shortening of Unterseeboot, literally "undersea boat".
The U-boat Campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies.
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain,Usage is mixed with some organisations, including the and preferring to use Britain as shorthand for Great Britain is a sovereign country in western Europe.
The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
War Order No.
World War I (often abbreviated as WWI or WW1), also known as the First World War, the Great War, or the War to End All Wars, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918.
World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier.
The Zimmermann Telegram (or Zimmermann Note or Zimmerman Cable) was a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico in the event that the United States entered World War I against Germany.