In which a cat narrates feline history in the age of european conquest
lithub.com
lithub.com
Since the excerpt doesn't get that far, my guess is that the reference is to "The Great Cat Massacre" and other historical cases of cat burning.
"And by the time we got to Rome, well . . . what Caesar saw, Caesar conquered, and we followed in his wake. We had been entreated to join his armies in order to protect Roman stores from vermin, and, locked in step with the Imperial Legions, we marched all the way to Britannia."