Hancock's wounds necessitated an absence of several months. William Hays was placed in command of the corps immediately after the battle of Gettysburg, retaining the command until August 12, when he was relieved by Major General Gouverneur K. Warren. Warren had distinguished himself at Gettysburg by his quick comprehension of the critical situation at Little Round Top, and by the energetic promptness with which he remedied the difficulty. He had also made a brilliant reputation in the V Corps, and as the chief topographical officer of the Army of the Potomac. He was, subsequently, in command at the Battle of Bristoe Station, a II Corps affair, and one which was noticeable for the dash with which officers and men fought, together with the superior ability displayed by Warren himself. He also commanded at the Battle of Mine Run and Morton's Ford, the divisions at that time being under Generals Caldwell, Alexander S. Webb and Alexander Hays.