In what country did americans fight in war in the 1960s-70s

The civil rights act that passed in 1964

Hich explains why the constitution gave congress the power to create a system of federal courts? the constitution wanted congress to share power with the judicial branch. the constitution anticipated the need for courts lower than the supreme court. the constitution wanted congress to share power with the appellate courts. the constitution anticipated the need for courts equal to the supreme court.

What from the columbian exchange had perhaps the biggest impact on the world?