I'd particularly be interested in seeing a depiction of warfare, or daily life under an empire or something.
I have images of this stuff when I think about Medieval Europe, or Ancient Rome , but this stuff draws a lot of blanks in other parts of the world.
Any suggestions?
Look into Akira Kurosawa. Seven Samurai is a classic that's really good. The filmography is huge with a lot of historical themes in feudal Japan
https://en.m.wikipedia.org/wiki/List_of_works_by_Akira_Kurosawa