Hinowa ga CRUSH! v01-v05, #33-45 (2017-2021)

English translation of the Japanese manga Hinowa ga Yuku (ヒノワが征く！).
On the island of Wakoku, the civil war offers anyone the chance of becoming a hero -- from fishing women to bastard children, any can make a name for themselves by working through the rigorous ranks of the army. Hinowa, a young woman with extraordinary skills, is determined to do just that, but soon learns things may not always go to plan...More than ten years after a disastrous battle, the war is still ongoing, and a girl with black hair and black markings washes up on shore...
From the writer behind Akame ga KILL! comes a brand new series!