Strike Witches ǿϮħŮ Season 1 Chapter 1 - 12 End
The year is 1939 - it was then that the Neuroi appeared. Nobody knows where they came from or what their ultimate agenda is, but the fact remains that their attacks drove people out of their towns and cities. In order to take arms against them, humanity develops a new anti-Neuroi weapon called the "Striker Unit." Using the power of magic to fight against the monsters, this new device enhances and amplifies the power of female magic-wielders.
Strike Witches ǿϮħŮ Season 2 Chapter 1 - 12 End
After discovering that Neuroi are capable of communication with humans and making peace with the nest above Gallia the Witches squads are now on a mission to restablish communication when a sudden attack vanishes the Neuroi, they now discover a new and massive nest that just appeared covering almost all Europe.