Description (Northern France Campaign 25 July to 14 September 1944) Bombardment along a five-mile stretch of the German line enabled the Allies to break through on 25 July. While some armored forces drove southward into Brittany, others fanned out to the east and, overcoming a desperate counterattack, executed a pincers movement that trapped many Germans in a pocket at Falaise. The enemy fell back on the Siegfried Line, and by mid-September 1944 nearly all of France had been liberated. During these operations in France, while light and medium bombers and fighter-bomber aircraft of Ninth Air Force had been engaged in close support and interdictory operations, Eighth and Fifteenth Air Forces had continued their strategic bombing.