The son of David Decimus Coath, Robert David Coath served with the Scottish Horse Yeomanry and was promoted to 2nd Lieutenant in 1914. After he transferred to the Royal Flying Corps, he scored eight victories flying the Bristol Fighter before he was wounded in action on 23 November 1917. Post-war, Coath traveled to Canada and the United States, working as a flying instructor for Bill Purcell at Curtiss field, New York in 1929. He returned to England in 1932 and served with Royal Air Force during World War II.
British Army WWI Medal Rolls Index Cards, 1914-1920
The Daily Register-Gazette, Rockford, Illinois, Saturday, 16 Mar 1929, page 22