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Austria-Hungary declares war on Serbia, beginning World War I.
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the assassination of Austrian archduke Franz Ferdinand by South Slav nationalist Gavrilo Princip on
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Germany invades Luxembourg and Belgium
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Austria-Hungary invades Russia.
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Germany begins the attack on Verdun.
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US Enters War, Congress authorizes a declaration of war against Germany
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American combat forces arrive in France.
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President Woodrow Wilson presents to Congress his outline of Fourteen Points required for peace.
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Allied forces begin the attack at Meusse-Argonne, the final offensive of the war.
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Peace conference begins at Paris