American forces suffered 4,000 casualties in its effort to invest the port.[50] Other elements of the 2nd Parachute Division were destroyed by American armored forces while on their way to assist the 5th Parachute Division at St. Malo.[50] American forces captured Brest on 20 September 1944.[50] What was left of the 2nd Parachute Corps was sent to Cologne after Falaise for rest and refitting.[50] Heydte's 6th Parachute Regiment went to Guestrow-Mecklenburg to form the foundation of a new regiment.[50]