Thanks Snippy.
I had always "known" the Bulge was Germany's last hurrah.
I've been reading all Sam's books about it. He has hundreds, perhaps a thousand plus books. 95% of them are military history. I'm concentrating on this specific period. All the individual battles that took place, from D-Day to the Ardennes. Very amazing stuff.
IIRC, Nordwind was planned to keep the Allies from reinforcing the Bulge with troops taken from Alsace, it turned out to be a case of petty much too "little, too late", the "Wacht am Rhein" offensive had been stopped by then and we were starting to push the Germans back.