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The US government knew the Japanese were going to attack the US and assume that the attack would take place at Pearl Harbor. The US Navy had been practicing for the attack for 20 + years. The surprise of the attack included the time of the attack (a Sunday morning when most US sailors were on leave or hung over from drinking the night before), the Japanese new low angle torpedo (US Navy didn't know Japan had it and assumed that battleship were safe in the harbor).

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15y ago

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