Jun 24, '44
The Allies have waited longer than predicted to make their cross-channel invasion. They also have landed with what is apparently only a US force, in the Netherlands. It is expected that the British will follow soon, perhaps farther south along the Channel coast. Two things are obvious at first dawn after the invasion: US paratroopers landed in or near Antwerp and were able to overawe the city's weak defenders. They hold Antwerp now, awaiting followup by ground forces; US ground-based forces that have landed early on, have great mobility, and are mechanized. One thrust of the invading forces has gone all the way to the Essen/Dortmund industrial area.

German forces defending the Atlantic Wall are concentrated in Belgium and France, leaving the Netherlands as easy pickings for the Allies - if they can exploit their early advantage. The German rail system is still functioning, albeit overtaxed (we have approximately half the rail capacity in '44 that we had at the beginning of the war). We will be able to move forces quickly to contain the US forces. Of course that will weaken the Atlantic Wall farther southwest.
It should be noted that the German strategy is not so much to keep the Allied invasion from establishing a foothold, but to smash it once the landing has been made.
Here is the situation at the moment of invasion:

And after our response. Note that the US mech/recon force that barrelled through Essen is in serious danger of being completely cut off:
