William Ewart Fairbairn (28 February 1885–20 June 1960) was a British soldier, police officer and exponent of hand-to-hand combat method, the close combat, for the Shanghai Police between the world wars, and allied special forces in World War II. He developed his own fighting system known as Defendu, as well as other weapons tactics. Notably, this included innovative pistol shooting techniques and the development of the Fairbairn-Sykes Fighting Knife. The television series Secrets of War suggested him as a possible inspiration for Q branch in James Bond.