In early January 1944, the 46th RTR was detached from the brigade to come under command of the British 1st Infantry Division for the Battle of Anzio landings (Operation Shingle) and rejoined the brigade in July. In March 1944 the brigade was transferred to the British V Corps which had a holding role on the eastern side of the Gustav Line by the Adriatic Sea while the Eighth and Fifth Armies combined to launch Operation Diadem in the Cassino sector. The Allies finally broke the German defences there after three unsuccessful attempts in the Battle of Monte Cassino since January.