Sir Hugh Montague Trenchard , Chief of the British Air Staff during... News Photo1910-1919,Air Force,Archival,Armed Forces,Black And White,Bombing,British Culture,Cap,Conflict,Crowd,Full Length,Geographical Locations,Human Face,Large Group Of People,Males,Manager,Military,Military Uniform,Mustache,Necktie,Outdoors,Photograph,Politics,Smiling,Strategy,The Human Body,Viscount,Walking,War,Winning,World War IPhotographer Collection: Hulton Archive 2005 Getty ImagesSir Hugh Montague Trenchard (1873 - 1956), Chief of the British Air Staff during World War I, walking with a crowd and other officers behind him, 1910s. Major-General Trenchard, who was instrumental in establishing the Royal Air Force, is recognized today as one of the first advocates of military strategic bombing. (Photo by Express Newspapers/Getty Images)