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Archduke Franz Ferdinand of Austria was assassinated by a Serbian nationalist in Sarajevo, Bosnia.
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Austria Hungary declares war on Serbia. WWI has begun
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August 4, 1914, German troops under Erich Ludendorff crossed the border into Belgium, in violation of that country’s neutrality.
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The First Battle of Marne
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The First Battle of Ypres
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The famous Christmas Truce on the Western Front
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The sinking of the Lusitania by a German torpedo, killing 128 Americans.
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Battle of Verdun
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The Battle of the Somme
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The Zimmerman Telegram was sent from Germany to Mexico, but Americans intercepted it. This was the final straw.
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US joins Allies
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The Armenian Genocide was the Ottoman's attempt to exterminate 1.5 million Armenians.
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The Brest Litovsk Treaty was signed between the Russians and the Germans, for Russian to leave the war.
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World War I ended in the defeat of the Central Powers in November 1918
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The Allies and Germany sign the Treaty of Versailles