After the breakout from
Normandy by the Allied armies, beginning August 13, 1944, the German forces held on stubbornly to the French and Belgian
English Channel ports. This forced the Allies to bring all supplies for their rapidly advancing armies from the
artificial harbor they had constructed off the beaches of Normandy, and from
Cherbourg. Because of its port capacity
Antwerp became the immediate objective of the British 21st Army Group commanded by
Field Marshal Bernard Montgomery. While
Antwerp fell to Montgomery on September 4 no supplies could be landed there until the German forces holding the lower reaches of the
Scheldt, between Antwerp and the
North Sea, were removed.
Tactical importance A feature known as the Sloe Channel separated the island of Walcheren from the South Beveland isthmus. A narrow
causeway connected the two, known to the Dutch as the Sloedam (it literally dammed the Sloe Channel) and in English as the Walcheren Causeway. The causeway carried a rail line from the mainland onto the island and to the port of
Vlissingen (or Flushing, as it was known in English). A paved road also ran the length of the causeway, which was about 40 metres (130 ft) wide and a kilometre (0.6 mile) long. On either side of this causeway, which was elevated only a few metres (feet) above sea level, marsh, mud-flats and deep water all hindered movement between Walcheren and South Beveland. ==Prelude==