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The Archduke and his wife was killed.
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It was an engagement between Russia and Germany in the first month of World War I.
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The North sea is a military area now.
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Around Great Britain it is a war zone.
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It was an unsuccessful attempt by the Allied Powers to control the sea route from Europe to Russia during World War I.
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The Battle of Verdun was the longest battle of World War I and was one of the bloodiest.
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It was one of the largest of World War I,
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Goes to Mexico in an effort to entice Mexico to join the war.
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The U.S president issues his Fourteen Points to peace.
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The treaty ends WW1.