On 10–11 July 1944, 148 RAC supported 153 Brigade of 51st (Highland) Division in Operation Stack, an attack on the Colombelles factory area of Caen, 'but it was much stronger than expected, and the attack failed miserably'. Two troops of 'A' Squadron in close support of the 5th Battalion, Black Watch found themselves engaged by Panzer IV and Tiger I tanks, and although one Sherman scored six hits on a Tiger and stopped it firing, 9 out of the 10 Shermans were knocked out. For Operation Goodwood (18 July) and Operation Totalize (8 August), 148 RAC again supported 51st (Highland) Division. During Totalize, 'B' Sqn attacked the village of Tilly la Campagne, which was 'browned' with the tanks' Browning machine guns. This induced many members of 1055 Grenadier Regiment to surrender. 'B' squadron knocked out three assault guns for the loss of one Sherman, and 'C' Squadron brewed up two Panther tanks for no loss.