As the Canadians and Polish launched their attack on 23 May, Major General Lucian Truscott, who had replaced Lucas as commander of U.S. VI Corps, launched a two pronged attack using five (three American and two British) of the seven divisions in the bridgehead at Anzio. The German 14th Army facing this thrust was without any armoured divisions because Kesselring had sent his armour south to help the German 10th Army in the Cassino action. The 18th Infantry Brigade, which was temporarily attached to the division from February to August, returned to command of the 1st British Armoured Division and were replaced by the 66th Infantry Brigade became a part of the division for the rest of the war.