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- Start of the war in Atlantic/European Theater (start of fighting)
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- Lend/Lease Act
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- Pearl Harbor
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- Start of the war in Pacific Theater (start of fighting)
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U.S. joins the war (declares war and is declared upon)
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- D-day
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Yalta Conference
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Death of Roosevelt
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- V-E day
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- Hiroshima
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Nagasaki
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- V-J day
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Creation of United Nations