All of your statements about slavery are true.
The answer to the question above is the Vietnamization.
United States President Richard Nixon's plan for the United States troops to gradually withdraw as South Vietnamese government forces assumed more combat duties was known as Vietnamization. It was Nixon administration policy to end the United States' involvement in the Vietnam War.
They travelled great distances by sea.
4838400 seconds? i searched lol
It allows the Government of the United States to "make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution."