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Archduke Francis Ferdinand is assassinated in Sarajevo
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Austria-Hungary declares war on Serbia, beginning World War I.
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Austria-Hungary moves to invade Russia
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Allied forces stop Germans from pushing into France during First Battle of the Marne
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Allied forces land on the Gallipoli Peninsula of the Ottoman Empire.
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German submarine sinks the passenger liner Lusitania during crossing from New York to Liverpool, England (128 Americans Die)
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Italy declares war on Austria-Hungary
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Naval Battle of Jutland takes place between British and German fleets
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Allies begin the push at the battle of Somme
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Germany returns submarine warfare after the sinking of the Lusitania.
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U.S Declares war on Germany for the first time
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Americans arrive in france
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Russia signs armistice with Germany
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Germany starts its last offense of WWI
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America first major independent fight (the battle of Cantigny)
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American forces stop German attempt to cross the Marne River
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Germany Signs armistice at Compiegne ending the war
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Allied and German representatives sign treaty of Versailles. The United States signs treaty of guaranty, pledging to defend France in case of an unprovoked attack by Germany