 Mott continued as a brigade commander under Maj. Gen. David B. Birney and was restored to division command (3rd Division, II Corps) in July, performing well during the Siege of Petersburg and the Appomattox Campaign.He was one of the few Union officers to be commended for his actions in the disastrous Battle of the Crater, for which he was given a brevet promotion to major general.Three days before the Confederate surrender at Appomattox, Mott was wounded in the leg at the Battle of Amelia Springs.