 Div Cav rested near Filignano and Montaquila. Two troops from C Squadron were positioned along the Venafro – Atina road and the rest of the regiment built the road between Filignano and Montaquila. On 18 April, Bonifant left for New Zealand on furlough and was replaced by his second-in-command, Major Nicholas Wilder. On 10 May, the final offensive against the Gustav Line began; the regiment was combined with the 22nd and 24th Battalions and No. 2 Company of the 27th Machine Gun Battalion to become Pleasants Force, to take over positions held by the Kimberley Rifles. On the night of 11 May, the final battle for Monte Cassino began. The French Expeditionary Corps outflanked the German defences in an advance along the Aurunci Mountains. The 78th Infantry Division advanced to Route 6 and on the right of the Eighth Army the II Polish Corps captured Monte Cassino. The Gustav Line was soon broken through and Allied troops in the Anzio beachhead conducted a breakout. By 26 May, the Axis was retreating; the regiment retrieved its vehicles and drove up the valley to Atina, passing through during the evening before it was stopped by opposition at Vicalvi. Three days later Vicalvi was captured by the 21st Battalion and the regiment advanced through the town. Since the bridge over the Fibreno River had been destroyed, B Squadron guarded the site while two troops found their way across and provided a flank guard for the Maori Battalion. C Squadron remained in Vicalvi on 31 May and A Squadron held Posta until it was replaced by the RAF Regiment. B Squadron moved up to Sora when the bridge was completed. On 1 June, B Squadron advanced toward Isola del Liri, which was captured by the 8th Indian Infantry Division. A Squadron was transferred to the 5th New Zealand Infantry Brigade to advance with it in pursuit, while the rest of the regiment laagered on the Fibreno. Allied troops rapidly advanced and Rome was captured on 4 June.
