Unrestricted submarine warfare and World War I

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Difference between Unrestricted submarine warfare and World War I

Unrestricted submarine warfare vs. World War I

Unrestricted submarine warfare is a type of naval warfare in which submarines sink vessels such as freighters and tankers without warning, as opposed to attacks per prize rules (also known as "cruiser rules"). 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.

Allies of World War I

The Allies of World War I, or Entente Powers, were the countries that opposed the Central Powers in the First World War.

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Casus belli

Casus belli is a Latin expression meaning "an act or event that provokes or is used to justify war" (literally, "a case of war").

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Neutral country

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).

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Prize (law)

Prize is a term used in admiralty law to refer to equipment, vehicles, vessels, and cargo captured during armed conflict.

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Q-ship

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.

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RMS Lusitania

RMS Lusitania was a British ocean liner and briefly the world's largest passenger ship.

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Soviet Union

The Soviet Union, officially the Union of Soviet Socialist Republics (USSR) was a socialist state in Eurasia that existed from 1922 to 1991.

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Submarine

A submarine (or simply sub) is a watercraft capable of independent operation underwater.

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Submarine warfare

Submarine warfare is one of the four divisions of underwater warfare, the others being anti-submarine warfare, mine warfare and mine countermeasures.

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U-boat

U-boat is an anglicised version of the German word U-Boot, a shortening of Unterseeboot, literally "undersea boat".

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United States

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.

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World War II

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.

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Zimmermann Telegram

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.

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