Where were the most of the large southern plantations located

Why did president lincoln place general mclellan under the command of general halleck? a. mcclellan failed to capture richmond. b. mcclellan was responsible for the north's defeat at the second battle of bull run. c. mcclellan failed to defeat lee at antietam creek.

Why did china build the great wall of china?

How did the actions of tsar nicholas 2 and his wife lead to revolution in russia