Because Europeans settled in the Americas lots of the Native Americans died. Most of them died because when the Europeans came over they brought new diseases with them which killed most of the Native Americans so the settlement of the Europeans effected the Native population badly
Roosevelt and most Americans considered the Pearl Harbor attack to be a dirty trick, because it occurred while the Japanese ambassador was talking with the US about keeping peace in-between the two nations.
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<span>Suspected political opponents were jailed or executed.</span>