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Archduke Franz Ferdinand assassinated in Sarajevo. His death is the event that sparks World War 1.
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Mobilizes its vast army to intervene against Austria- Hungary in favor of its ally, Serbia.
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Germany invades Belgium, beginning World War 1
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Germans fire shells filled with chlorine gas at Allied lines.
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A German submarine sinks the passenger liner Lusitania
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British employ the first tanks ever used in battle, at Delville Wood.
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Germany resumes unrestricted submarine warfare in european waterways.
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President Wilson outlines his case for war to congress.
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Congress authorizes a declaration of war against Germany.
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Congress passes this authorizing the draft.
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Germans sign peace treaty with the new Bolshevik government of Russia.
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First major American offensive of the war.
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Americans attack the Germans of chateau- Thierry. The battle would morph into the larger battle of Belleau Wood.
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Begins when 3000,000 American troops under the direct command of General Pershing fling themselves in the German lines.
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Armistice is signed ending fighting on the Western Front.
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