Canadian Raymond Collishaw, the highest scoring ace in the Royal Naval Air Service, ended the war officially credited with 60 victories against enemy aircraft. Joining the Royal Naval Air Service in 1915, Collishaw gained a reputation for relentlessly engaging the enemy, even when he was outnumbered. In mid-1917, he commanded a flight of Sopwith Triplanes, all with Canadian pilots, known as the "Black Flight" for the planes' all-black paint schemes.