The Battle for Brittany took place between August and October 1944. After breaking out of the Normandy beachhead in June 1944, Brittany was targeted because of its naval bases at Lorient, St. Nazaire, and Brest. These ports were a key part of the logistical plan for support for the Allies. The main objective was to secure Breton ports which could prove useful to the Allies to land more supplies; and the secondary objective was cease continued use of Breton ports for U-boat operations. Ultimately, the Americans simply surrounded these ports for the rest of the war, keeping the Germans isolated. Their surrender came at the end of the war. By that time, the need for these port facilities in Brittany had become redundant when the Port of Antwerp was captured.