 In February 1918, Warner accepted a commission as a lieutenant in the US Naval Reserves, and was assigned to manage a design-based subdivision (in Washington, D.C.) of a newly formed American Camouflage Section.Among his fellow camouflage designers were Frederick Judd Waugh (marine painter), Gordon Stevenson (portrait painter), John Gregory (British-born sculptor), Kenneth MacIntire, M. O’Connell (advertising artist), M. Nash, and a Navy ensign named Richardson.Concurrently, a research-based subdivision was set up at Eastman Kodak Company in Rochester, New York, under the direction of Lieutenant Loyd A. Jones, an optical physiologist.