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The cause if the war was that Garvrllo Princp killed Archduke Franz Ferdinand and his wife
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Austria-Hungry declares war on Serbia
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Lusitania is a British ocean liner that was sunk by a German submarine in World War 1,cause a major diplomatic uproar.
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Zimmerman Telegram that was sent to Mexico from Germany to ask them to fight with them in the war ,but Mexico refused.
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The war ended because Germany surrendered ,so all states or Country agreed to stop.
