The objective at Utah was to secure a beachhead on the Cotentin Peninsula, the location of important port facilities at Cherbourg. The amphibious assault, primarily by the US 4th Infantry Division and 70th Tank Battalion, was supported by airborne landings of the 82nd and 101st Airborne Division. The intention was to rapidly seal off the Cotentin Peninsula, prevent the Germans from reinforcing Cherbourg, and capture the port as quickly as possible. Utah, along with Sword on the eastern flank, was added to the invasion plan in December 1943. These changes doubled the frontage of the invasion and necessitated a month-long delay so that additional landing craft and personnel could be assembled in England. Allied forces attacking Utah faced two battalions of the 919th Grenadier Regiment, part of the 709th Static Infantry Division. While improvements to fortifications had been undertaken under the leadership of Field Marshal Erwin Rommel beginning in October 1943, the troops assigned to defend the area were mostly poorly equipped non-German conscripts.