Battle of the Bulge. Missed the start 3 days ago, but a few reminders brought all of the reading, movies, and sightseeing back into focus.
Last ditch effort by Hitler, fought off by people who he thought were weak. And were far, far from it. Especially the 101st, 44th Engineers, parts of the 10th Armored, and a lot of leftover stragglers who defended Bastogne. Those guys were surrounded, and repeatedly attacked, shelled, and generally made miserable for a week. And when it was all over, these guys had enough to attack back.
Amazing.
I've managed to visit the area back in 2008- and I would recommend visiting to anyone. Very worth it.