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Britain, U.S., Japan, France, and Italy sign the Naval Disarmament Treaty.
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Spain becomes a republic with the overthrow of King Alfonso XIII
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Amelia Earhart becomes the first woman to fly over the Atlantic solo.
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Hitler is appointed German chancellor and gets dictatorial powers
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The Great Terror begins in the Soviet Union
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Japan and Germany sign anti-Comintern pact
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The Hindenburg burst into flames in New Jersey.
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The helicopter is invented
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