Amazon Warrior.

In a post-apocalyptic world, a camp of Amazon women is raided by a gang of murderous bandits, who kill everyone in the camp except one small girl. She grows up to be a mercenary, and one day she takes a job escorting the two daughters of a powerful warlord across a river. She finds out that the job turns out to be more dangerous than she thought, and she runs into someone from her past she thought she'd never see again.