I just came across a list of the "100 greatest movies" from 1996, generally regarded as the centennial of motion pictures. No indication of the judges or criteria, but obviously the artsy crowd judging by some of the selections. Having been a motion picture critic myownself, it's obvious that some of the judges didn't have a clue. :

The top 10 were (with my ratings):
1. Citizen Kane ****
2.Casablanca *****
3.Godfather Pt I ****
4.Gone With The Wind *****
5.Lawrence of Arabia **** (M1919s vice Maxims)
6.Wizard of Oz **** (No shooting)
7.The Graduate *** (Ditto)
8.On the Waterfront *** (Double ditto)
9.Schindler's List ****
10.Singin' in the Rain **** (No shooting)
Of these, only Lawrence is actually a war film though Nos. 2, 4 and 9 are set in wartime. Other war films among the top 100 were:
13. Bridge on the River Kwai *****
26. Dr. Strangelove *****
28. Apocalypse Now ****
37. Best Years of Our Lives **** (No shooting)
39. Dr. Zhivago ****
52. From Here to Eternity ****
54. All Quiet on the W. Front *****
56. MASH (vastly over-rated) ***
79. The Deer Hunter ****
83. Platoon *****
89. Patton **** (M60 tanks on both sides)
Actually, it's a list of 100 English-language films. No "Grand Illusion," one of the great Great War movies.
(Unaccountably, two outstanding WW I films were not included: Paths of Glory ??? and The Blue Max

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As any film critic SHOULD know, the two ingredients for a completely satisfactory motion picture are guns and horses, hence MY all-time pick of The Greatest Achievement in the American Cinema is John Milius' 1975 "The Wind & the Lion."
Beyond that, the "top 100" list only has 7 westerns, led by High Noon, Butch Cassidy, and Stagecoach. THE best western, John Ford's "The Searchers," was only 96th. >
Make mine WITH butter. Over to you, moviegoers...