 He was transferred to the infantry in late 1864, leading a division of IV Corps at the Battle of Nashville.Then Elliott commanded the District of Kansas in the Department of the Missouri before being mustered out of the volunteer service on March 1, 1866.On June 17, 1866, President Andrew Johnson nominated Elliott for the award of the honorary grade of brevet major general, U.S.A., to rank from March 13, 1865, and the U. S. Senate confirmed the award on July 23, 1866.