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Franz Ferdinand was killed by Gavrilo Princip.
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Austria-Hungary declares war on Serbia one month after Archduke Franz Ferdinand was assassinated.
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Germany declares war on Russia four days after Austra-Hungary declared war on Serbia.
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Battle of the Marne is the first battle with Trench Warfare.
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The U.K blocks the flow of goods by declaring the North Sea as a military area.
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Germany declares a war zone in Great Britain which affects the neutral merchant ships.
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The British boat called the Lusitania was sunk by a German submarine.
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Kaiser Wilhelm sets a limit on the unrestricted submarine warfare because of outrage by other countries.
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The British give President Wilson a telegram from Arthur Zimmerman to Mexico stating it would help Mexico regain lands from the U.S.
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After the death of Alexander III, Nicholas II took the place as the new czar.
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The U.S joins WWI as allies of Britain, France, and Russia.
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The U.S declares war on Germany mainly because of the telegram.
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Bill that allows Congress to draft citizens for the military.
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The battle is also known as the Third Battle of Ypres.
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The Bolsheviks overthrow the Russian government during the Russian Revolution.
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The Central Powers and Russian Government sign an armistice.
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Woodrow Wilson proposes the Fourteen Points to try and mediate peace among the fighting countries.
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Kaiser Wilhelm II is forced to step down and leaves Germany.
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Germany signs the Armistice at Compeigne, France which ends fighting on their part.
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The Treaty of Versailles is signed which officially ended WWI.