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Archduke Franz Ferdinand was killed in Sarajevo, Bosnia by Gavrilo Princip who was a member of a Bosnian nationalist group.
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Sides of the war resulted from a complicated series of treaty. Triple Alliance - Austro-Hungary, Germany, Italy(who switches sides) Triple Entente - Russia, France, Britain Two Sides - Allied Powers and Central Powers
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German choses to invade France through Belgium. This brings Great Britain into the war because of their treaty with Belgium.
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This battle stops German advance into France and creates the pattern of trench warfare that will last for the next 4 years.
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German U-boats threaten to sink any ships in British waters.
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The Lusitania was a British passenger ship carrying 1200 people, including 128 Americans. German attack outraged Americans who believed it was an unnecessary terror attack. Wilson sent ambassadors to Germany to protest the U-boat policy.
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French passenger ship that, like the Lusitania, had Americans on it. Wilson made an agreement with the Germans, demanding that the Germans would stop the U-boat attacks.
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Wilson go reelected by running as the "peace" candidate. "He kept us out of the war."
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The Zimmermann Telegram was sent from Germany to Mexico. It was intended to get Mexico to join the war with Germany by promising Mexico their old territory in Arizona, New Mexico, and Texas.
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Germany sinks six US ships breaking the Sussex Pledge, and outrages the American people.
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Wilson's request is approved by both the House and the Senate, and the US enters the war on the side of the Allies.
