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WW1 starts July 28, 1914 but was triggered on 28 June 1914 by the assassination of the Archduke Franz Ferdinand of Austria (heir to the throne of Austria and Hungary) and his pregnant wife Sophie
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Austria-Hungary declared war on Serbia and WW1 begins
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Germany blocked the sea using submarines.
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The Second Battle of Ypres begins. It is during this battle that the Germans first use poison gas.
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The Battle of Verdun begins. The Battle of Verdun was the longest battle of World War I and was one of the bloodiest.
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The Battle of the Somme begins. During the Battle of the Somme, tanks are first introduced into battle.
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The United States declares war on Germany.
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The armistice agreed upon between the new Russian government and the Central Powers goes into effect.
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U.S. President Woodrow Wilson issues his Fourteen Points to peace.
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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 WWI.
