Your suggestions reminded me of "Cromwell" and "Charge of the Light Brigade" also.
Wind and the Lion........# of Days in Peking .......when the UN like garrison from many counties were surrounded (Charlton Heston ?)
Sand Pebbles regarding the boxer rebellion I believe.
Thanks for the tips.....this is a valuable thread for movies to see .....:o)
Stay Safe !
Another great Brit movie worth the watch is "Culloden" made in 1964.
A really good movie if you can stand subtitles is the Polish film "Kanal" about the Warsaw uprising of 1944
Breaker Morant - Law of land warfare class film in Infantry Advanced Course 1982
I can't believe no one has mentioned "Zulu"