The Blade(1995)

Nguyet is an orphaned child living with her grandma in a seaside village of devout Catholics. When the village becomes a battlefield, the grandma, enraged by the fact her son died due to Vietcong mine traps, begins throwing grenades against the winning Vietcong soldiers. To ensure a strategical victory, Dung, a young combatant, is deployed to gun down the old woman.