The Saga of Tanya the Evil, Vol. 5 (manga)

As hinted at by Colonel Lergen's "thoughtful" words of advice, an attack on Dacia has been ordered by the Empire, and the fearsome power of the new mage battalion is deployed. Determined to unleash the power of modernity upon the enemy, Tanya prepares her freshly polished human shields for an all-out battle. There's no holding back with a resume-worthy achievement on the line..