Smith had joined the Territorial Army by commission into the Queen's Own Oxfordshire Hussars, in which Churchill was already an officer, in 1913, and was a captain in the regiment before the outbreak of the First World War. On its outbreak he was placed in charge of the Government's Press Bureau, with rank of full colonel and responsibility for newspaper censorship. He was not very successful in this role, and in 1914–1915 served in France as a staff officer with the Indian Corps with ultimate temporary rank of lieutenant-colonel. He and his successor as 'recording officer' (a Colonel Merewether) later collaborated on an official history entitled "The Indian Corps in France" (published 1917).