Complex sentence: He became Secretary to the Air Committee in November 1912 and a staff officer in the Directorate of Military Aeronautics in May 1913 and was transferred to the Reserve of the Royal Flying Corps on 17 December 1913.
Split into simpler sentences: He became Secretary to the Air Committee in November 1912 and a staff officer in the Directorate of Military Aeronautics in May 1913. He was transferred to the Reserve of the Royal Flying Corps on 17 December 1913.