 The location of this attack, chosen because of the location of the Maginot Line, was through the Belgian Ardennes forest (sector 4), which is off the map to the left of Maginot Line sector 6 (as marked).Maginot Line fortifications were manned by specialist units of fortress infantry, artillery and engineers.The infantry manned the lighter weapons of the fortresses, and formed units with the mission of operating outside if necessary.