A few suggestions.
1) Ničija zemlja - No Man's land (2001), set in the Bosnian war:
https://www.youtube.com/watch?v=Q_zQZrdXA4g
Ragtag reservists doing a good job at not killing the other people, and somehow managing to stay alive in the process.
The weapons are accurately potrayed and so are the uniforms and the tactics, or the lack there of.
Bosniaks vs. Bosnian Serbs.
2) לבנון - Lebanon (2009)
Israeli movie set during the Peace for Galilee operation. S. Maoz, the director is a (IDF) tanker (reservist) combat vet and the movie is based on his experiences during the war.
The Sho't looks a lot bigger from the inside
I think you can find the film on YouTube?
Israel (& Phalangists) vs. PLO/Syrians/Hezbollah and friends.