Christopher Birdwood Thomson, 1st Baron Thomson, (13 April 1875 – 5 October 1930) was a British Army officer who went on to serve as a Labour minister and peer. He served as Secretary of State for Air under Ramsay MacDonald in 1924 and between 1929 and 1930, when he was killed in the R101 disaster. Early life Born in Nasik (now Nashik) in the Bombay Presidency of India to a military family, Thomson attended Cheltenham College. His father was Major-General David Thompson, Royal Engineers, and his mother was the daughter of Major-General Christopher Birdwood; William Birdwood, 1st Baron Birdwood was another grandson of Major-General Birdwood. Career Military After graduating from the Royal Military Academy, Woolwich, in 1894, Thomson was commissioned into the Royal Engineers. He served first in Mauritius and then saw action during the Second Boer War (1899–1902) during which he was in command of a field company section and was mentioned in dispatches. He also had his first encounter with aviation when he was detailed to help with the RE Balloon Section outside Kimberley. After the war he became an instructor at the School of Military Engineering at Chatham and then at Sierra Leone. He was promoted to captain and brevet major in 1904 and in 1909 joined the Army Staff College in Camberley. In 1911 he went to the War Office, and in 1912 Thomson was appointed military attaché with the Serbian army during the first and Second Balkan Wars, after which he returned to the War Office in 1913. During the First World War Thomson first served at the British Expeditionary Force Headquarters and was Chief Military Interpreter between Sir John French and General Joffre. In 1915 he was sent to Bucharest as military attaché on Kitchener initiative to bring Romania into the war. But when there he quickly formed the view that an unprepared and ill-armed Romania facing a war on three fronts against Austria-Hungary, Turkey and Bulgaria would be a liability rather than an asset to the allies. This view was brushed aside by Whitehall, and he signed a Military Convention with Romania on 13 August 1916. By the end of 1916 he had to alleviate the consequences of Romania's capitulation, and he supervised the destruction of the Romanian oil wells to deny them to Germany. From 27 August 1917 to 27 May 1918 Thomson served as Commander Royal Engineers (CRE) of 60th (2/2nd