[INM@RLM]

John Vasco requested a couple of references ("tell me ..."). It would be ungraceful not to oblige with responses.

1. If the Scandinavian campaign was not to secure Germany’s northern flank (as well as exploiting all that it could from the countries invaded), then you tell me what the point of it was.

The Telling:
OKW Directive signed by Hitler on 1st March 1940.
"The development of the situation in Scandinavia makes it necessary to prepare for the occupation of Denmark and Norway by formations of the Armed Forces ('Case Weser-exercise'). This would anticipate English action against Scandinavia and the Baltic, would secure our supplies of ore from Sweden, and would provide the Navy and Air Force with expanded bases for operations against England."
Source: Trevor-Roper: Hitler's War Directives
i.e. nothing at all to do with "securing Germany's exposed northern flank against possible invasion."


2. After the fall of Dunkirk, look at any campaign map and you will see that the German army struck west & south. Or maybe they did not – you tell me…

The Telling:
The point I made actually related your account of the events after the breakthrough at Sedan: there was no mention of Dunkirk in your own published text on this page.
After Sedan the Germans actually struck west and north, not south as you wrote here: check the map at p.179 of Robert Forczyk's 'Case Red' or any equivalent study. First the pocket was closed by reaching the coast at Abbeville on 20 May, and only after that cordon had been made relatively secure were Boulogne and Calais attacked by the Germans coming up the coast from the south. Consequently Boulogne was not assaulted and captured by the Germans until three days later. It took even longer to secure Calais because of the "Stop Order" issued on the evening of the 23rd May. This is all further confirmed in detail by the map in Guderian's 'Panzer Leader' (multiple editions), and he was the man directly in charge of assaulting these two ports.
Sources as noted in the response.
So it was very much not the case that - as stated in 'Zerstörer'- the German thrust after 13th May was "west to the coast at Boulogne and Calais"

I've now corrected my typo and converted 2A into A2. My apologies, and thank you for that, John.