Acting Master Frank M. Harris commanded the CSS Black Warrior during the battle of Elizabeth City (10 Feb 1862). He was appointed acting midshipman on July 20, 1861, and was promoted to acting master December 14, 1861. He served in the North Carolina Squadron aboard the C.S. steamers Ellis, Forrest, Sea Bird, and Curlew. Following the sinking of the CSS Curlew in the battle of Roanoke Island (7-8 Feb 1862), the Curlew’s guns were placed on the schooner M.C. Etheridge. She was commissioned the CSS Black Warrior: Harris was appointed as her commander. Harris burned the CSS Black Warrior to prevent her capture during the battle of Elizabeth City.
Harris later served aboard the CSS Bienville and CSS Jackson in New Orleans during 1862. He was serving on the CSS Manassas when she was destroyed (24 Apr 1862). Harris was captured when the CSS Louisiana was captured on April 28, 1862, and sent to Fort Warren; he was exchanged August 5, 1862. Harris was captured on the prize steamer Young Republic on May 6, 1864, and was released November 29, 1864, at Fort Lafayette in New York by order of the Secretary of the Navy.