Finally cleared for field duty, Field rejoined the army in Tennessee in February 1864, serving on the board of generals appointed to court-martial Lafayette McLaws. Promoted to major general, he commanded the veteran division formerly led by John Bell Hood. In the confused fighting in the Wilderness, Field suffered two minor wounds, but stayed in action throughout the Overland Campaign, including the Battle of Spotsylvania Court House. When Lt. Gen. James Longstreet was wounded during a friendly-fire incident in the Wilderness, Field briefly assumed command of the First Corps, but he was later replaced by Maj. Gen. Richard H. Anderson, who had more seniority and combat experience. Field's division continued to perform well during the fighting at Battle of Cold Harbor and Siege of Petersburg. On the afternoon of August 16, 1864, at the Battle of Deep Bottom, 5,000 Union soldiers under Brig. Gen. Alfred H. Terry broke through the Confederate lines and briefly threatened to rout the defenders. The tide finally turned when Field orchestrated a hard-hitting counterattack that forced the Federals to retreat. In April 1865, he surrendered with his division at Appomattox Court House. Numbering nearly 5,000 men, it was one of the few units still in fighting condition.