Here is MY list with an "X" by the ones that I have seen.
===== BLACK & WHITE FLICKS ====
Start out with some B&W WW2 movies.
(x) The Fighting Seabees
(x) Sands of Iwo Jima
(x) Gung Ho
(x) Objective Burma
(x) Escape to Victory
(x) They Were Expendable (1945)
(x) Back to Bataan
(x) The Purple Heart (1944)
(x) In Harms’ Way (1965)
(x) The Longest Day
(x) The Story of G.I. Joe
(x) Pork Chop Hill
===== WW2 IN COLOR ====
Long list that should have many of your favorites.
(x) Patton
(x) The Bridge at Remagen
(x) The Big Red One
(x) Tobruk (1967)
(x) When Trumpets Fade
(x) Thin Red Line
(x) Von Ryan's Express
(x) Battle of the Bulge
(x) The Bridge On the River Kwai
(x) A Bridge Too Far
(x) Cross of Iron
(x) Castle Keep
(x) A Midnight Clear
(x) Darby's Rangers
(x) Guns of Navarone
(x) Force 10 From Navarone
(x) Anzio (Mitchum, 1968)
(x) To Hell and Back
(x) Too Late the Hero (1970)
(x) The Desert Rats
(x) Hart's War
(x) Merrill’s Marauders
(x) Go For Broke
(x) The Devil's Brigade
(x) Where Eagles Dare (my Main Man Clint)
(x) The Eagle Has Landed
(x) Hell is For Heroes (Steve McQueen)
(x) D-Day, the Sixth of June (1956)
(x) Up from the Beach (1965)
(x) The Dirty Dozen
(x) Kelly's Heroes (my Main Man Clint)
===== PRISONER OF WAR ====
( ) Prison Ship (1945)
(x) The Great Escape
(x) Stalag 17
(x) Schindler's List
(x) Tears of the Sun
( ) The Bamboo Prison (1954 E.G. Marshall)
(x) Hell's Angels (1930 Howard Hughes)
(x) Dawn Patrol (1930)
(x) Blue Max
(x) 633 Squadron
( ) The War Lover (Steve McQueen)
(x) Flying Tigers 12 O'clock High
(x) Thirty Seconds Over Tokyo
(x) The Bridges at Toko-Ri
(x) The Battle of Britain
(x) Memphis Belle
====VIET NAM ===
( ) China Gate (1957)
(x) Hamburger Hill
(x) Green Berets
(x) Platoon
(x) Full Metal Jacket
(x) Apocalypse Now
==== NAVAL MOVIES =====
(x) Silent Service
( ) Corvette K-225 (1943)
(x) Battle of the Coral Sea (1959)
(x) Das Boot (The Boat)
(x) Sand Pebbles
(x) Sink the Bismarck
(x) Run Silent, Run Deep
(x) Destination Tokyo
(x) The Enemy Below
( ) Submarine Command (1951)
(x) PT-109
(x) Tora! Tora! Tora!
(x) Midway
(x) Mr. Roberts
(x) Operation Petticoat
(x) Ensign Pulver
(x) How the West was Won (1912)
(x) Red Badge of Courage (1951 Audie Murphy)
(x) Shenandoah
(x) They Died with Their Boots On
(x) Fort Apache
(x) She wore a Yellow Ribbon
(x) The Horse Soldiers (1959)
(x) Glory
(x) Gettysburg
(x) Gods and Generals
==== 19th CENTURY ===
(x) The Last of the Mohicans (1992)
( ) Revolution (Al Pacino)
(x) Drums among the Mohawks
(x) The Crossing (Jeff Daniels)
(x) The Duelist
(x) Waterloo
(x) Zulu (1964 Michael Caine)
( ) War and Peace (American version with Henry Fonda)
(x) A Farewell to Arms (1957 Rock Hudson)
(x) Lawrence of Arabia
(x) All Quiet on the Western Front (1979 starring John Boy)
(x) All Quiet on the Western Front ( 1930, an earlier version)
<<<<< FOR THE LATE COMERS >>>>>>>
For you young generation who is just getting started.
(x) Jarhead
(x) Fly Boys
(x) We Were Soldiers
(x) Black Hawk Down
(x) Valkyrie
(x) The Patriot (Mel Gibson)
(x) Miracle at St Anna
XXX Pearl Harbor ---- scratch this one; it is not much of a war movie
(x) Enemy At the Gate
(x) Cold Mountain
(x) U-571
(x) The Great Raid
(x) Saving Private Ryan
(x) Captain Corelli's Mandolin
(x) Flags of Our Fathers
(x) Letters of Iwo Jima
( ) 300 (okay, I will throw in this cartoon)
(x) Napoleon (1927 French) - Re-released in 1980's.
(x) War and Peace (Russian 7-hour version)
( ) One of Our Aircraft is Missing (1941)
( ) The First of the Few (aka Spitfire 1942)
( ) We Dive at Dawn (1943)
(x) Stalingrad
(x) Der Untergang (German 2004 – available at BB)
(x) Tunes of Glory (with Obewan Kenobe)
(x) El Alamein; The Line of Fire (Italian)
( ) The Man Who Never Was (British)