Man, where do I start.

(no particular order)
Patton
We were soldiers
The Longest Day
Blackhawk down'
Gettysburg
Gods and Generals ( I think I'm the only one in the country who likes this movielol)
Saving Private Ryan
Band of Brothers
predator
Aliens
Heartbreak Ridge
Flags of our Fathers
Full Metal Jacket
just to name a few