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.

President Lincoln demoted McClellan because C. McClellan failed to defeat Lee at Antietam Creek. McClellan also failed to pursue Lee after the Battle of Antietam despite Lincoln's commands.

there has only been 12 presidents. the 12th president is/was moon jae-in

b) the confederacy had to pay all union war expenses.