In September 1944, Antwerp fell intact to the Allies. Rather than concentrate on clearing the Schelde, the Allies launched Market-Garden which turned out to be a tragic blunder on Monty's part. In October, Monty finally autherised the clearing of the Schelde to open Antwerp. The Storming of Walcheren in November 1944 re-opened Antwerp just in time for the Battle of the Bulge. Without Antwerp being operational, the Allied supply situation would have severly handicapped, especially on fuel, ammunition and supplys. The re-opening of Antwerp solved these problems by removing 300 miles off the Allied supply lines. In my opinion, the storming of Walcheren would prove decisive in the Allied victory at the Bulge.