Why were African Americans not allowed to participate in the civil war in the beginning remember to answer from the north and south POV

How did geographical features create a civilization in china

The industrial revolution began in great britain for a number of reasons. two advantages great britain had which were necessary for industrialization were a. raw materials and a large workforce. b. unstable politics and a small landmass. c. abundant land and a small population. d. private wealth and a strong military.

Any study/memorization tips? i have exams in a week and it would be great to try suggestions!you ; )