What was cultural diffusion in The Olmec and the Mesopotamian civilization?

How did the economic impacts of the great depression differ in the united states and in the soviet union?

Which of the following did the maya, aztec, and inca all have in common

Who were the copperheads? a. a native american tribe that rose up during the war b. northern democrats opposed to the war c. ships that ran the union blockade d. an elite force of union soldiers in the west