 Complete the following phrase:  Crocker was not to remain there long, however, as on 21 April 1940 he was promoted to the acting rank of brigadier and was appointed to command of the 3rd Armoured Brigade, in succession to Brigadier Vyvyan Pope, a fellow RTR officer. The brigade, alongside Brigadier Richard McCreerys 2nd Armoured Brigade and Brigadier Frederick Morgans 1st Support Group, formed part of Major-General Roger Evanss 1st Armoured Division formerly the Mobile Division, then serving in England but preparing to move to France. Crockers brigade was depleted as the British Expeditionary Force BEF was expelled from the continent during the Battle of France in MayJune 1940. Landed at Cherbourg as the rest of the BEF 