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The Archduke of Austria-Hungary was assassination along with his wife.
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The trigger for the war was the assassination of Archduke Franz Ferdinand of Austria, heir to the throne of Austria-Hungary
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Germany uses U-boats to sink all ships.
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German U-boat torpedoed and sank the RMS Lusitania, a British ocean liner en route from New York to Liverpool, England.
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The Battle of the Somme, also known as the Somme Offensive, was a battle of the First World War fought by the armies of the British and French empires against the German Empire
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Wilson is re-elected to be president.
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British intercepted a telegram from Germany saying that they will attack the U.S.
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US declares to join the war.
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Authorized the United States federal government to raise a national army for service in World War I through conscription.
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All merchant ships crossing the Atlantic Ocean would travel in groups under the protection of the British
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Prohibited the use of military but what passed after the US entered the war.
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Flu broke out.
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The Fourteen Points was a statement of principles for peace that was to be used for peace negotiations in order to end World War I.
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Russia pulls out of the war.
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Act of the United States Congress that extended the Espionage Act but passed.
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Germany surrendered.
