Robert E. Lee
Robert E. Lee
He gave command of the Army to Grant.
Grant
Burnside.An Alternate Answer:On March 11, 1862, Lincoln relieved McClellan as General-in-Chief and took direct command of the Union armies.On November 2, 1862, Lincoln named Ambrose E. Burnside as Commander of the Army of the Potomac, replacing McClellan.
Ambrose Burnside, while well intentioned, was not the most qualified or skilled of general officers. One of the reasons he initially declined command was he knew he was unqualified to lead an entire army into battle. He did indeed doubt his own command abilities as well as his knowledge of strategy, tactics and logistics.
Lincoln knew that Grant would do anything to win the war.
He knew Grant would do anything to win the war.
He knew Grant would do anything to win the war.
It just seemed to fight better when Grant was in command - initially in the West, and then, after he was promoted General-in-Chief, in the East.
As a condition for taking command of the Army of the Potomac, General Joseph Hooker was allowed to report directly to President Lincoln. No other Union field general was granted this privilege, and the dual high command structure then in place caused problems in command and control. It also contributed to the Union's defeat at the Battle of the Second Bull Run.
President Lincoln had great faith in the abilities of General Ambrose Burnside. Three times he asked Burnside to take command of the Army of the Potomac. If he agreed, then Lincoln would dismiss McClellan and replace him with Burnside. On the third request Burnside accepted. McClellan was informed on November 7, 1862 that he was dismissed.