Bradley's troops marched through the treacherous hedgerows onward to St. Lo, suffering over 5,000 casualties during the advance. However, American tanks and infantry slowly learned how to work with each other to cover each others' weaknesses. An innovative American sergeant named Culin took the steel rails Germans used on the beaches, cut them down to the right size, and welded them in front of tanks. These make-shift heavy bulldozers began to force their way through the hedgerows. This invention allowed US troops to advance several hedgerow walls in a matter of hours, instead of entire days as seen in previous days of hedgerow fighting. This innovation also prevented tanks from exposing their weak underbelly to enemy fire when they climbed the hedgerows.

Since the early days of the campaign, Allied bombers had already rained devastation upon St. Lo. As a prisoner of war, when Bearden traveled through the town on 10 Jun, he recalled that the town appeared "as if a gargantuan machine had just picked up the city, put it in a bag, shook it real good, and emptied it out onto the ground like a huge pile of rubbish." When the American troops arrived on 15 Jul, they grew tired of the slow advances through the hedgerows, and sought more aggressive results. Instead of conducting house-to-house fighting among the ruins where "dead animals and human body parts lay jumbled", they simply attempted to fight through them. On one occasion, American troops drove a bulldozer into a German-held house, burying the three German soldiers inside. By 18 Jul, the Americans had taken control of the little that was left of the town.

Though the Normandy Campaign officially ended on 24 Jul 1944 as defined by the US Army Center of Military History, German forces would not be cleared from the Normandy region until 22 Aug at the conclusion of the Falaise pocket operation.