Europa is a continent at war. The East Autocratic Imperial Alliance has invaded the Atlantic Federation, and in just a few months has managed to conquer a third of Federation territory. The explosion of Equestrian magic into the world shortly beforehand has only intensified the conflict.

In their desperation, the Federation used their reserves of magic to create a batch of super soldiers; the New Generation Valkyrur. Two of these soldiers, a pair of sisters, are assigned to an elite Ranger platoon and sent to the front lines as part of the largest military effort in history; Operation Northern Cross.

A crossover with Valkyria Chronicles 4. It's also a spin-off of Fallout Girls, but reading that first isn't necessary.