The 82nd Airborne were finally relieved by the 90th Infantry Division, who began disembarking at 16:00 on D-Day and were all ashore by June 8. The original plan for the 90th had been that they should push north toward the port of Cherbourg, but Collins changed their assignment: they were to cut across the Cotentin Peninsula, isolating the German forces therein and preventing reinforcements from entering the area. Their poor performance led to their being replaced by the more experienced 82nd Airborne and 9th Infantry Division, who reached the west coast of the Cotentin on June 17, cutting off Cherbourg. The 9th Division, joined by the 4th and 79th Infantry Divisions, took control of the peninsula in fierce fighting. Cherbourg fell during the Battle of Cherbourg on June 26, but by this time the Germans had destroyed the port facilities, which were not brought back into full operation until September.