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The Archduke was murdered by a Serbian.
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Archduke Franz Ferdinand and his wife were assassinated while visiting Sarajevo, Bosnia. He was next in line for the Austro Hungarien throne. The killings set off decades old tentions in Europe and started WWI.
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Austra-Hungary declares war on Serbia.
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This was the first use of gas as a weapon by the Germans.
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The British passenger ship that got hit by 2 torpedoes from a German U-boat.
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When Wilson was reelected, he pledged that Americans would stay neutral during the war.
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A telegram that offered U.S. territory to Mexico in return for joining the German cause.
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The U.S. was no longer neutral. They had officially entered the war.
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All of the fighting stopped, because there was an armistice.
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This treaty ended WWI.
