" All his men were crack shots, but Fairbairn himself favoured close-range physical combat over the bullet. ‘His system is a combination of ferocious blows, holds and throws, adapted from Japanese bayonet tactics, ju-jitsu, Chinese boxing, Sikh wrestling, French wrestling and Cornish collar-and-elbow wrestling, plus expert knowledge of hip-shooting, knife fighting and use of the Tommy gun and hand grenade. "

― Giles Milton , Churchill's Ministry of Ungentlemanly Warfare: The Mavericks Who Plotted Hitler's Defeat