Elliott re-enlisted for a second tour of duty on January 1, 1864 at Warrenton, Virginia, Elliot and his regiment then engaged in the Union's Expedition to Turkey Run through January 4; the Campaign from the Rapidan to the James (May 4-June 12), which included the Battle of Todd's Tavern (May 7); Lieutenant-General Ulysses S. Grant's Overland Campaign, which included the Battle of Yellow Tavern (May 11), Sheridan's Raid on Richmond through May 24, and the battles of Haw's Shop (May 28), Totopotomoy Creek (May 28-31), Cold Harbor (June 1-12), Trevilian Station (June 11–12). Elliott then sustained a gunshot wound to the groin and thigh during Union operations on June 21. Following recovery from his wounds, he was transferred to an artillery battery on September 9. Engaged with his newly reconstituted regiment in the Richmond-Petersburg Campaign, he then fought in the battles of Poplar Springs Church (September 29-October 2, 1864), Hatcher's Run (February 5-7, 1865) and Dinwiddie Court House (March 30-31) before entering the war-ending Appomattox Campaign and the Battle of Five Forks (April 1).