The Saga of Tanya the Evil, Vol. 16 (manga)

After somehow managing to live through the most grueling battle of theirentire careers, Tanya and the 203rd receive a letter from the General Staff. Itscontents are, essentially, “Hop on these rockets and go smash up theRepublican Army’s HQ. Oh, and be sure to come back from thistechnologically unprecedented flight alive once you’re done with yourabsurdly dangerous mission!”