Strike Witches Rei: 1937 Fusou Kaijihen

Nearly two decades have passed since the conclusion of the Great War, with peace prevailing despite ongoing minor conflicts. In the Fuso Empire, Sakamoto Mio is preparing to enter the war against the Neuroi, an alien force. To become a Strike Witch, she must stand out among her fellow cadets. An opportunity arises when the Neuroi initiate a new and violent assault.