Who replaced McClellan after he was fired for the second time?

After General George B. McClellan was fired for the second time in November 1862, he was replaced by General Ambrose Burnside as the commander of the Army of the Potomac. Burnside, known for his distinctive facial hair and his previous leadership at the Battle of Antietam, faced immediate challenges in his new role and led the army into the Battle of Fredericksburg shortly after his appointment.