Just finished reading "Cadian Honour"

Ending was pretty selfaware:

"He [General Bendikt of Cadian 101th] paused on the lip of the portal for one last look at Potence. The rebellion had been crushed, the Scourged had been thrown back and most importantly, Cadian honour had been restored. Some might call Potence a wasteland. But to the military minds of the Astra Militarum, this was peace."

Note: Potence is basically an agri world with one city (and it wasn't even a hive city) being quiet residence of sector-ruling noble house so disgustingly rich they are even named "Richstar". And the "wasteland" is unusual for 40k exaggeration, capital got devastated and millions died but rest of planet was implied to be not touched by fights.