 "The Question of the Scheldt", a study providing "a history of the international legal arrangements governing the Western Scheldt", was prepared for the use of British negotiators at the Treaty of Versailles in 1919.In the Second World War, the Scheldt estuary once again became a contested area.Despite Allied control of Antwerp, German forces still occupied fortified positions in September 1944 throughout the Scheldt estuary west and north, preventing any Allied shipping from reaching the port.