 The unit was relieved on May 3, 1944, and moved to a rest area at Pignataro.On May 11, 1944, the attack on the Gustav Line and the Hitler Line commenced with the Westminsters and the 5th Armoured Division forming the exploitation force, hoping to break into the Liri Valley and the assault on Rome.The advance through the Liri valley included the Westminster's most famous action, the assault water crossing at the Melfa River.