I'm a bit of a history / military buff so it'd have to be something along the lines of
either:
A historical epic about the fall of Constantinople to the Turks in 1453, made in the style of "Gladiator" and "Kingdon of Heaven" but without the currently en-vogue nausea-inducing, close-up, shakey camerawork in the battle scenes (why do they do that??!!)
or
a remake of the '60s war movie "Battle Of The Bulge" - historically accurate this time, though!