Utu, a New Zealand film set during the Māori Wars in the 1860s. A Māori warrior in British service turns renegade after British forces destroy his village. A white farmer then seeks his own revenge after the renegade slaughters his family and destroys his homestead. This film strongly helped to reinforce my desire never to go into combat against Māoris. Big, scary, angry people seemingly built for war. I'm related to a couple of tribes by marriage and I'm really glad they're on my side!
http://www.imdb.com/title/tt0086497/plotsummary