War of 1812:
The President's Lady (1953) & The Buccaneer (1958) were the only two I could recall and both have Chuck Heston as General Andy Jackson.
Mexican War:
Tom Berenger's One Man's Hero (1999) is the only one I could remember.
The War Between the States:
1. Gettysburg (1993)
2. Gone with the Wind (1939)
3. Glory (1989)
4. Rocky Mountain (1950) Great Errol Flynn film with the Rebels out west.
5. The Horse Soldiers (1959)
6. The Raid (1954) The Rebs invade the US from Canada.
7. Cold Mountain (2003)
8. Gods and Generals (2003)
9. The Red Badge of Courage (1951) John Huston directs Audie Murphy & Bill Mauldin in Stephen Crane's epic of cowardice and courage.
10. Band of Angels (1957) Surprisingly frank film on race relations.
Honorable Mention:
Santa Fe Trail (1940)
Two Flags West (1950)
Santa Fe Trail (1940)
Virginia City (1940)
The Siege at Red River (1954)
Alvarez Kelly (1966)
Escape from Fort Bravo (1954)
Indian Wars:
1. Tie between Fort Apache (1948), She Wore a Yellow Ribbon (1949) & Rio Grande (1950) as these were John Ford's triple tribulate to the US Calvary.
2. The Searchers (1956)
3. "Geronimo" (1993) (TV)
4. Sergeant Rutledge (1960)
Honorable Mention:
They Died with Their Boots On (1942)
Two Rode Together (1961)
Cheyenne Autumn (1964)
Major Dundee (1965)
Apache (1954)
The Unforgiven (1960)
Red Sun (1972) Quirky film of Jap warrior in old west.
Pre-World War One:
1. Wind and the Lion, The (1975)
2. The Wild Bunch (1969)
3. Professionals, The (1966)
4. "Rough Riders" (1997) (TV)
5. 55 Days at Peking (1963)
6. They Came to Cordura (1959)
World War One:
1. Sergeant York (1941)
2. Lawrence of Arabia (1962)
3. The Dawn Patrol (1938)
4. The African Queen (1951)
5. Hell Below (1933) Robert Montgomery & Walter Huston - Surprisingly good World War I Submarine yarn.
6. Blue Max, The (1966)
7. Paths of Glory (1957)
8. What Price Glory (1952)
Honorable Mention:
Lost Patrol, The (1934)
Shout at the Devil (1976)
Pre-WW2:
The Sand Pebbles (1966) only fits here.
Next will be World War Two to Vietnam.
You left out A&E's wonderful The Crossing. Revolutionary War, Washington crossing the Delaware to attack the Hessians Christmas Day.
2. Gone with the Wind (1939)
Sitting Bull
Chief Crazy Horse
War Arrow
Conquest of Cochise
WW I:
All Quiet on the Western Front
The Lost Battalion
The Trench
The Fighting 69th
The Napoleonic Wars: Master and Commander (2003) starring Russell Crowe and Paul Bettany
Beau Geste in its many incarnations (the 30's film with Robert Preston, the 60's remake with Telly Savalas, the 70's comedy "The Last Remake of Beau Geste with Michael York, Ann-Margret and Marty Feldman)
Mexican Revolution:
Pancho Villa
Viva Zapata
And Starring Pancho Villa as Himself
El Salvador
The Cuban Revolution:
Havana
Bosnia-Herzegovenia:
No Man's Land
Harrison's Flowers
The Boer War:
Breaker Morant
South Africa:
A Dry, White Season
Soviet-Afghanistan War
The Beast
"The Time of Their Lives"
The Lighthorsemen, the Australian Mounted Infantry at Beersheba in ww1
My favorite non WWII war movie is Master and Commander. I also like the Horatio Hornblower movies from A&E.
How could I forget Gallipoli?!? Yes, I realize I probably mispelled it. That one is good as Master and Commander in my book.
BTW The Devil's Brigade is now showing on Turner Classic Movies...