Parke served as chief of staff to Burnside during the Overland Campaign, in which the latter commanded IX Corps, as well as in the beginning stages of the Siege of Petersburg. After the Battle of the Crater, Burnside was relieved of command and Parke assumed command of the IX Corps. He led it at the Battle of Globe Tavern, the Battle of Peebles' Farm, and the Battle of Boydton Plank Road.