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Because the assassin was a Serbian it began a huge rivalry between Austria and Serbia.
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Austria was unsatisfied with the agreements and negotiations with Serbia so Austria then declared war with Serbia. This was the beginning of World War 1.
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Germany declares war on Russia who is now allies with Serbia.
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Germany's assault to France turned into a long and bloody deadlock.
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An attempt to have Russia out of the war.
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The start of the battle of Verdun
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Battle of the Somme begins.
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A warning from the Germans that their submarines would sink any of the ships in oceans of Britain.
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The United states declaring war on the side of the allies.
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Battle of Cambra begins
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Peace Treaty between Russia and Germany to end the war.
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With the help of the 2 million American troops, the Allies progressed in the battle with Germany
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An agreement and negotiations between the Allies and Germans to end the war.
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The final agreement between Germany and the Allied powers.