Saga of Tanya the Evil, Vol. 21 (manga)

After escaping from Brest Naval Base, what remains of the Republican Army declares its intent to continue resisting the Empire from the southern continent. In response to this nasty case of snails in their lower regions, the General Staff issues a double dose of up-and-coming tactical genius Major General Romel and a certain legendary battalion to cure what ails the fatherland...?