That night, at about 7:00 PM, Luftwaffe bombers attacked Bastogne, killing 21 in an aid station. Because it lacked sufficient troops and those of the 26th VG Division were near exhaustion, the XLVII Panzer Corps concentrated its assault on several individual locations on the west side of the perimeter in sequence rather than launching one simultaneous attack on all sides. The assault—led by 18 tanks carrying a battalion of infantry—pierced the lines of the 327th's 3rd Battalion (officially, the 1st Battalion, 401st Glider Infantry), and advanced as far as the battalion command post at Hemroulle.