In spite of intense resistance, which shot down two of the squadron aircraft in the first attacking formation, the unit bombed a railroad junction at Frevent, bridges, rolling stock, and a radar station to disrupt the enemy's retreat through the Falaise gap in August, and was awarded a Distinguished Unit Citation for this action. The squadron assisted in Operation Market Garden, the airborne attack on the Netherlands, in September. It then supported the assault on the Siegfried Line by pounding transportation, warehouses, supply dumps, and defended villages in Germany. By the following month, it became apparent that the advance of Allied forces on the continent made it operationally necessary for light bomber units like the 669th to be located east of Paris to support ground forces.