Despite the renowned fighting ability and reputation of the 51st, Montgomery decided after the campaign in Sicily in August 1943 that Wimberley, although Montgomery admired him greatly, was showing tiredness after over two years in command, and should be removed from his command and replaced. This he did, and Wimberley was replaced by Major-General Charles Bullen-Smith, of the King's Own Scottish Borderers, who had been GOC of the 15th (Scottish) Infantry Division, another TA formation. In the event, Bullen-Smith was himself replaced by Major-General Tom Rennie, a Highlander, in July 1944, when the division was fighting in Normandy after being brought back to the United Kingdom by Montgomery (upon his promotion to command the 21st Army Group) to spearhead the Allied invasion of Normandy (codenamed Operation Overlord). On 5 August 1943 Wimberley was made a Companion of the Order of the Bath (CB).