Most Helpful Guy
Tons of great war movies in this thread, but I'll mention a couple of others. WWII has always fascinated me, both in the "wow, what strange and interesting weapons, vehicles, and ideas they came up with" sense, and also in the "how did anyone let this happen?" sense. As I got older and I studied it, I came to understand the latter, and the crazy train of events that allowed it to happen.
Anyway, I got particularly interested in the Holocaust, and the "why didn't they fight back?" question. The following two movies speak to that, each from a different perspective.
The Grey Zone (2001) is about death camp prisoners who were given the choice of "die now, or become a part of the mechanism that helps kill lots of others." These prisoners actively participated in the extermination of tens of thousands of other prisoners, yet they did what little they could to fight back, and to survive.
Uprising (2001) is the (based on a) true story of a small group of Jews who fought back during the liquidation of the Warsaw Ghetto (when the Germans, who had moved Jews and others into this sealed ghetto for "temporary storage" had started to empty it out and send train-loads of them to the extermination camps). This very small group was able to hold of the much larger and better-equipped German army for weeks, and allowed a small few to escape.
Most Helpful Girl
The only war movies I can tell you are Gettysburg and Gods and Generals. Though if you're looking for more informative than entertainment then there's one called "The Gettysburg Story".
Jee, bet you can't guess where I'm from.