Swampthing;
Hitler's "last gasp" , the "Battle of the Bulge" came about when in a surprise breakout, Hitler tried to get his troops to reach the sea at Antwerp, cutting between the American & British forces. The full fury hit after the German Army spent weeks preparing in the Vosges mountains. The full force hit American forces in early December..catching many by surprise, even Eisenhower was caught flat-footed.
Bastogne was a key spot, since so many highways met there. I visited there when I was stationed in Germany, it is very hilly there , and soil would be greasy in December..an army NEEDED the roads to move, so the 101st held the town and the Wermacht (German Army) flowed around, effectively sealing them off from the rest of the US forces.
When the demand came from the German commander for the surrender of the 101st, Gen "Tough" Tony MacAuliffe sent back one word.. "NUTS"
Upon hearing of the 101sts predicament,Patton wheeled his 3rd Army around and drove pell-mell for Bastogne. The 4th Armored reached there first and the 37th tank Bn drove through the German forces encircling the town..then the Germans closed up the gap again.
When one of the tank commanders was informed that the Germans had reclosed the gap, he was quoted as saying, " Hey, they have us surrounded again, the poor Bast_ _ _s " !
Below see map showing the US forces surrounded US=blue German= red
Correction; ignore second (same) map..