The Saga of Tanya the Evil, Vol. 26 (manga) — Carlo Zen

The battle between the Empire and the Russy Federation begins! Tanya, dispatched to the east, ought to be disrupting the foe’s front lines...But instead, she’s sighted over Moskva, the enemy capital?! Meanwhile, the Commonwealth, which has been keeping a close eye on the war on the continent, gradually rolls into the conflict. Its Volunteer Army flanks the Empire—and among their ranks is Mary Sue, a promising mage and the child of the Regadonian war hero Colonel Anson Sue, who Tanya killed! Will Tanya at last meet her match in magical combat?