...and whoever it may concern: How would you have prepared for that? Especially in terms of air armament?
You know I am German and like to play "what if". This time I consider about a plan that does not see Germany as winner, but as very early looser.
"Operation Katharina" was a plan by Winston Churchill, at this time still First Lord of the Admiralty (you cannot successfully google for that plan, I tried already) of 1939. With Danish help, Germany was to be cut from Scandinavian ore supplies. The British navy had to enter the Danish straits and operate in the Baltic Sea to do so.
I want to extend that a bit (political goodwill always prerequisited): British an Danish troops perform a landing operation in East Pomerania. From the beachhead, they try to march forward in Southeastern direction to make contact with the Polish.
British and Dutch troops invade Germany north of the river Rhine, then march towards the (war-important) industrial area of the Ruhr, which is not far. French and Belgian troops invade Germany south of the river Rhine, then go westward. They may cross the river and approach their British and Dutch allies at the Ruhr.
Don't worry about your expectations. You will win anyway. The German Western frontier was virtually undefended in September 1939, and the German troops attacking Poland expect a lot of things, but not a thrust into their back. The war could have ended within weeks and with a complete German defeat.
So, I would like to hear your (constructive) comments about that! You could say: "If we will win anyway, we need no special preparation!" Right - but boring too. Please develop some ideas!
Best regards, RT