Little progress was made over the coming days, and several tanks became disabled and lost in the rubble in their efforts supporting the attacks made by the New Zealand infantry. The two infantry brigades of the 2nd New Zealand Division were withdrawn from Cassino in early April and sent to the Apennines but the 4th Armoured Brigade remained in place, under the command of the 6th British Armoured Division which now had responsibility for the sector. The New Zealand regiments provided indirect artillery support during this time. The Allied forces began preparing for a major offensive against the Gustav Line. This commenced on 11 May, and then, on short notice, the 19th Regiment was attached to the British 4th Infantry Division. It was to support that division's operations against Cassino. The regiment moved up on the night of 13 May and went into action the next day. Further engagements followed over the next few days, during which two tanks of B Squadron were lost, before Cassino was captured on 18 May. The regiment then returned to the control of the 2nd New Zealand Division.