Spartacus: Blood & Sand (2009)

In its war on the Greek peninsula, the Romans convince the Thracians to join them in defeating the Getae, who have been raiding Thracian villages for generations. The Thracians are fierce warriors and prove to be valiant in battle. They are deceived by the Roman commander, Claudius Glaber, who orders them to fight against the Greeks, something they had not counted on. One of them in particular refuses to fight and rebels against the Romans only to lose the fight and is enslaved along with his wife Sura.

IMDB