The 'Blaue-Bewegung' was the German unrealised plan within 'Seelöwe' for the easternmost part of the invasion of the UK, between Dover and Beachy Head, by the six divisions of Generaloberst Ernst Busch’s 16^th Army of Generalfeldmarschall Gerd von Rundstedt’s Heeresgruppe 'A', which were to be delivered by four groups of transport vessels from Rotterdam in the Netherlands, Ostend in Belgium, and Calais, Dunkirk and Etaples in France (summer/autumn 1940).