 It returned to action in the fall of 1863 in Longstreet's Corps during the Battle of Chickamauga and the subsequent Chattanooga campaign.The Legion infantry later returned to Virginia and in March 1864, it was converted to mounted infantry and assigned to Gary's Cavalry Brigade in the Department of Richmond.They served in that department, until January 1865 when the brigade was reassigned to Fitzhugh Lee's Cavalry Division.