[Legbreaker]

The point about the Danes is a good one, however I believe that can be explained fairly simply.

The Danes were held in reserve by the XI Corps and were therefore further west at the time the Corp came under threat of being cut off. The bulk of the Corp was in fact spread out over a very wide area - the 5th ID down to the southeast, 8th disappeared over the eastern horizon and the 2nd Marines stretched over the Vistula delta.
If you follow my assessment of the offensive, the entire Corps was short on fuel due to loss of shipping capacity in the Baltic (this loss of shipping also helps explain why the Corps can't be evacuated by sea).

The Danes however were probably the link unit between the US/Canadians and the Germans. They were able to squeeze back into Germany before the route was cut by the advancing Pact forces - the remainder of the Corp too crippled by the fuel shortage to move fast enough (and the Marines still spread across numerous rivers).

Although crippled by the lack of fuel, the XI Corps still posed enough of a challenge defensively to deter the Pact forces from pressing against their enclave in an attempt to push them into the sea - the XI Corp still possessed much of the ammunition, food and other stores gathered over the preceeding months, even years for their intended offensive operations.