Saga of Tanya the Evil, Vol. 4 (light novel)

A devil wanders the battlefield in the guise of an adorable young child and n her name is Tanya Degurechaff! After returning from the sandy southlands, Tanya n receives an incredibly suspicious order from headquarters to embark on a n training exercise. In reality, command has sent her on a covert mission to n initiate a border conflict with the Federation. Soon the Empire finds itself n embroiled in another fight it cannot back down from, even if it means making the n entire world their enemies! n