Groundless - Sekigan no Sogekihei

The island nation of Alistria is ravaged by civil war. The Waldrons are a small family of father, mother and young daughter running an arms shop there. But a cruel military plot leaves the father dead, the daughter taken away, and the mother beaten down with her left eye lost. But Sophia Waldron is no ordinary stricken mother or weeping widow. She takes up the only sniper rifle remaining in the ruins of their humble little store and sets out with only one goal in mind: revenge against the army that took away everything she cared about.