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Franz Ferdinand, Austrian Archduke, was assassinated by "the black hand" a group of Serbian nationalists.
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Austria-Hungary declares war on Serbia
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World War 1
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The unofficial Christmas truce is declared
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Germany declares a "war zone" around Great Britain, essentially effecting a submarine blockade where even neutral merchant vessels were to be potential targets.
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The Battle of Gallipoli Begins
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Tsar Nicholas II takes personal control over Russia's armies.
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The Battle of Verdun was the longest battle of World War 1 and was one of the bloodiest.
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The Battle of Jutland, the major naval battle of the war, begins.
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During the Battle of the Somme, tanks are first introduced into battle.
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Germany sends the secret Zimmerman Telegram to Mexico in an effort to entice Mexico to join the war. The British intercept and decipher the coded message.
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Russian Tsar Nicholas II abdicates.
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The United States declares war on Germany.
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U.S. President Woodrow Wilson issues his Fourteen Points to peace.
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Russia signs the Treaty of Brest Litovsk, which is a peace treaty between Russia and the Central Powers.
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Germany signs the armistice at Compiegne, France. Fighting ends on the 11th hour of the 11th day of the 11th month (i.e. 11 a.m. on November 11).
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The Treaty of Versailles officially ends World War 1.
