 Complete the following phrase:  Cassels served in the Second World War, where he was serving in England, and he attended a shortened course at the Staff College, Camberley. In May 1940 he then became a brigade major with a Territorial Army TA unit, the 157th Infantry Brigade, commanded by Brigadier Sir John Laurie, formerly Casselss Commanding Officer CO in the 2nd Seaforths, part of Major General James Drews 52nd Lowland Infantry Division, which was sent to France in June 1940 to bolster the French Army in the aftermath of the British Expeditionary Forces BEF 