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Archduke Franz Ferdinand is assassinated in Sarajevo. His death is the event that sparks World War I.
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it was the officially ends of WW1
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Russia mobilizes its vast army to intervene against Austria-Hungary in favor of its ally, Serbia
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A German submarine sinks the passenger liner Lusitania. The ship carries 1,198 people, 128 of them Americans.
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The British employ the first tanks ever used in battle, at Delville Wood. Although they are useful at breaking through barbed wire and clearing a path for the infantry, tanks are still primitive and they fail to be the decisive weapon
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The Germans fire shells filled with chlorine gas at Allied lines. This is the first time that large amounts of gas
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Germany resumes unrestricted submarine warfare in European waterways. This act, more than any other, draws the United States into the war
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That the unites states decode a message from germany to mexicon if they attack the united states they would have texas and and the rest of southwest
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Congress passes the Selective Service Act authorizing the draft. Although criticized for destroying democracy at home while fighting for it abroad, President Wilson claims he sees no other option and
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Congress authorizes a declaration of war against Germany. The United States enters World War I on the side of France and Britain.
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The Battle of Cantigny is the first major American offensive of the war. Though small in scale, the Americans fight bravely and soon go on to larger attacks..
