 Complete the following phrase:  Prior to 1942, Jones decoy tank force was somewhat informal, deployed as needed in deceptions. However, for the Battle of Alam el Halfa, at the end of August 1942, the decoys became 4th Armoured Brigade a recently disbanded formation and, mixed with real tanks, were given the task of harrying Rommels flanks. During this time Jones, as commander of the Brigade, was briefly promoted to the rank of Brigadier a rank which was removed following completion of the 