 Complete the following phrase:  After Gettysburg, Tilton retained brigade command until August 18, 1863. He returned to regimental command until November 19, when he again resumed brigade command. When the Army of the Potomac was reorganized in 1864 for Lt. Gen. Ulysses S. Grants Overland Campaign, Tilton was assigned to lead his regiment in Jacob Sweitzers brigade of Griffins division. He served in that role in the Battle of the Wilderness, the Battle of Spotsylvania Court House, and the Battle of Cold Harbor, as well as in the early stages of the 