The right of Custer’s division gained a foothold on the enemy’s works simultaneously with Devin’s, but on the extreme left Custer had a very severe combat with W. H. F. Lee’s cavalry, as well as with Corse’s and Terry’s infantry.  Attacking Terry and Corse with Pennington’s brigade dismounted, he assailed Lee’s cavalry with his other two brigades mounted, but Lee held on so obstinately that Custer gained but little ground till our troops, advancing behind the works, drove Corse and Terry out.  Then Lee made no further stand except at the west side of the Gillian field, where, assisted by Corse’s brigade, he endeavored to cover the retreat, but just before dark Custer, in concert with some Fifth Corps regiments under Colonel Richardson, drove ihe last of the enemy westward on the White Oak road.

Our success was unqualified; we had overthrown Pickett, taken six guns, thirteen battle-flags, and nearly six thousand prisoners.  When the battle was practically over, I turned to consider my position with reference to the main Confederate army.  My troops, though victorious, were isolated from the Army of the Potomac, for on the 31st of March the extreme left of that army had been thrown back nearly to the Boydton plank-road, and hence there was nothing to prevent the enemy’s issuing from his trenches at the intersection of the White Oak and Claiborne roads and marching directly on my rear.  I surmised that he might do this that night or early next morning.  It was therefore necessary to protect myself in this critical situation, and General Warren having sorely disappointed me, both in the moving of his corps and in its management during the battle, I felt that he was not the man to rely upon under such circumstances, and deeming that it was to the best interest of the service as well as but just to myself, I relieved him, ordering him to report to General Grant.

I then put Griffin in command of the Fifth Corps, and directed him to withdraw from the pursuit as quickly as he could after following the enemy a short distance, and form in line of battle near Gravelly Run Church, at right angles with the White Oak road, with Ayres and Crawford facing toward the enemy at the junction of the White Oak and Claiborne roads, leaving Bartlett, now commanding Griffin’s division, near the Ford road.  Mackenzie also was left on the Ford road at the crossing of Hatcher’s Run, Merritt going into camp on the Widow Gillian’s plantation.  As I had been obliged to keep Crook’s division along Stony Creek throughout the day, it had taken no active part in the battle.

Years after the war, in 1879, a Court of Inquiry was given General Warren in relation to his conduct on the day of the battle.  He assumed that the delay in not granting his request for an inquiry, which was first made at the close of the war, was due to opposition on my part.  In this he was in error; I never opposed the ordering of the Court, but when it was finally decided to convene it I naturally asked to be represented by counsel, for the authorization of the Inquiry was so peculiarly phrased that it made me practically a respondent.