 Complete the following phrase:  He commanded the 3rd Infantry Brigade, part of Major-General Sir Harold Alexanders 1st Infantry Division, from 1938 to 1939. Handing over the brigade to Brigadier Thomas Wilson, a fellow KRRC officer, he was sent home from France in December 1939 and promoted to acting major-general on 21 December with seniority backdated to 18 July 1938, to assume command of the 46th Division. Curtis rejoined the British Expeditionary Force BEF with his division in April 1940. 