The Journey, starring Yul Brynner, Deborah Kerr, and Jason Robards is a Cold War flick set in Hungary as the Soviets crush the 1956 revolution.
Gallipoli, starring an incredibly young Mel Gibson, tells the story of a long, failed WWI campaign that’s pretty much forgotten outside of Australia, New Zealand, and Turkey. By far one of the best (and most heartbreaking) war movies I’ve ever seen.
Drums along the Mohawk (Henry Fonda, Claudette Colbert) is set on the American frontier (then in central New York Colony) during the War of Independence. Indians and Tories (Loyalists) are at least as big a threat as the British.
You know what I’d like to see? A war movie called Jenkins’ Ear.
The events of Battleship Potemkin predate the Russian Civil War by over a decade.
The first Russian Revolution was in 1905, after Russia was defeated by Japan.
Arrrrrr, aye! But 1739 to 1748? Gonna be one helluva long movie! 
Salvador, A James Wood film about the death squads in the El Salvador “civil war”.
Directed by Steven Spielberg and starring Tom Hanks as Lawrence Washington! 
Or The Killing Fields, set in Cambodia under Pol Pot.
And Israel, too.
The Last Samurai was about the Satsuma Rebellion of 1877, which was the last gasp revolt against the modernization/Westernization of Japan.
My favorite film on the period (which I would have thought pretty well-known, for anyone with a connection or interest in Ireland) is The Wind That Shakes the Barley. The title comes from a song about the 1798 United Irishmen uprising, which should be better remembered; as far as I know there are no depictions in film.
The Admiral, about the Anglo-Dutch wars (also known as Michiel de Ruyter). Not to be confused with the film of the same name about one of the Korean-Japanese wars.
Young Winston has several scenes featuring Churchill’s combat experiences in Afghanistan, Sudan and South Africa, most notably the cavalry charge at Omdurman.
Never heard of this before. Thanks for mentioning it!
Boetie Gaan Border Toe is the only film I know set in the Angolan War
Battle of Warsaw is not about the Warsaw battles during WW2, but rather during the 1920 battle during the Polish-Soviet War
Colonel Wolodyjowski involves the Ottoman Invasion of Poland in the late 17th century.
There are other entries in this series that involve other wars, but they are TV Serieses, not movies.
Parts of Alatristeinvolve the 30 years war, as well as all versions of Cyrano De Bergerac.
no movie about the pig war