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Yamamoto starts to talk to Japan officers about a possible attack on Pearl Harbor.
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People in Washington did not believe this information they thought it was just a threat.
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Hawaii got proper defense equipment from the Naval Military base.
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The U.S. used a code called magic. To moniter Japan's secret messages.
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Japan commanders planned and finalized the attack on Pearl Harbor.
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Japan commanders planned the bomb plot of exact locations on ships.
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Submarines were first involved in the attack.
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U.S leaders called war warning indicating an attack.
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Sensed some Japanese action.
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Message forwarded 4 hours before the attack but U.S. leaders did not get it till the first attack.