During World War II, he was a Major and was Military Assistant to the Secretary of State for War. In January 1940, he was an instructor at the new staff college in Haifa in then Palestine where he was Lieutenant Colonel in his ranking. He was Commandant of the School of Combined Operations in December 1940 where he became Secretary to the Commanders-in-Chief Committee. In February 1942, he became the Director of Military Intelligence in the Middle East in Cairo, Egypt. After the First Battle of El Alamein, he was appointed the 8th Army's Brigaider General Staff (Operations). He became Magor General in May 1943.