John Morphew enlisted 17 November 1863 at age 45 at Benton, Pulaski County, Arkansas to the 4th Arkansas Union Cavalry with his brother Gainer Prince Morphew. John’s original discharge was furnished by the War Department on 29 November 1893. The 4th Regiment, Arkansas Union Cavalry was organized at Little Rock December 1863 and served within Arkansas:
Duty at Little Rock, Arkansas until June 1865
Skirmish at Saline River, Arkansas, 15 February 1864
Operations in Arkansas against guerrillas 1-31 July 1864
Skirmish, Hurricane Creek, 23 October 1864
Skirmishes at Clarksville, 28 September and 9 October 1864