Línea Gustav
The Moro River runs from the central mountain spine of Italy to the Adriatic coast south of Ortona. The German defences on the Moro were a centerpiece of the Winter Line, which guarded the eastern side of the Apennines along Route 5. Montgomery hoped to punch through the Winter Line, capture Ortona and Pescara and advance to Rome. The British 78th Infantry Division, which had been spearheading V Corps since the Volturno Line actions and had sustained over 7,000 casualties in less than six months, was relieved by the fresh 1st Canadian Infantry Division (Major-General Christopher Vokes), ready to renew the offensive on 5 December 1943. The 78th Infantry Division was sent into the mountains on the relatively quiet left wing of the army, joining the British 5th Infantry Division (Major-General Gerard Bucknall) under XIII Corps.