Strike Witches Zero: 1937 Fusou Kaijihen
Strike Witches: 1937 Fuso Sea Incident
ストライクウィッチーズ零 1937 扶桑海事変
Strike Witches Zero:1937 Fuso Sea Incident is a ongoing manga series being released in Nyantype magazine. It is illustrated by Ningen.
The story follows Sakamoto Mio as she receives training to become a Witch from Kitagou Fumika. The plot will later shift to the Fuso Sea Incident as the story progresses.
(Source: Strike Witches Wikia)