What was the Japanese purpose in attacking the United States? What was their long-term plan?

Japan attacked Pearl Harbor in hopes that it would destroy the US Pacific Fleet and weaken the resolve of the American people. They hoped that the defeat at Pearl Harbor would be so devastating, that Americans would immediately give up. The goal was a quick US capitulation allowing Japan to continue imperial expansion.

Explanation:

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regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.