Initial objective would be some airfields since air support is a key element in Blitzkrieg. So we are talking about the Luftwaffe (Fallshirmjagers). I agree about the use of the Kriegsmarine capitol ships. Airlift some infantry units. Amphib landing of 1 panzer and the 2 motorized divisions. With the great losses of the Brits in Dunkirk, resistance would be minimal from ground forces. Majority of the fight would be from the RAF and the Royal Navy. Once they moved inland, The Wehrmacht could have succeeded.

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Tschuss