Something amazing in the OTL: The German Wehrmacht paused two day's for rest and supply, at the gates of Dunkerque, before rolling up the Alied forces in the town in summer 1940. This delay resulted in the evacuation of some 400,000 troops of mainly British and French in Operation Dynamo, who otherwise would likely have been captured, or killed.
WI the Germans did not pause these crucial two day's and what would have happened than in the following WW2 period?