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The assassination of Archduke Franz Ferdinand instigated the beginning of WWI.
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When Serbia's Gavrilo Princip assassinated the archduke of Austria-Hungary, Franz Ferdinad, and his wife, they got very angry. They declared war on Serbia, and because of that, Serbia's allies declared war on Austria Hungary, and Austria-Hungary's allies declared war on a different country, and etc...This was the main cause of WW1 starting.
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The Germans used bombs filled with poisonous gas, and threw them at the enemies. Later, all countries learned this skill and developed new, more poisonous gasses to use.
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German U-Boats attacked the passenger ship, Lusitania, and this caused lots of commotion. America got very angry that this happened, and Germany declared that they would attack any ship leaving, or coming to Great Britain
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Germany sent a telegram on a "secure" line, and Britain intercepted the message. It was headed to Mexico, asking them to invade America and try and take back states.
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US decides to enter world war 1.
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President Woodrow Wilson was re-elected for a second term, pledging to keep America out of the war.
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The Bolsheviks overthrew Vladimir Lenin and set up a new gov't.
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WW1 ended on November 11, 1918, where 27 nations gathered around in Paris, France.
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The treaty of Versailles stated that Germany had to pay the Allies billions of dollars,
