The inciting incident is brutally efficient. While traveling through a neutral corridor, her carriage is ambushed. Her knight guards are slaughtered in visceral, unglamorous panels. The "pigs" of the title—the bandits—are not romanticized outlaws. They are depicted as feral, unhygienic, and driven by base greed and cruelty. They are human, but they have surrendered their humanity to the lawlessness of the borderlands.
If you have more information about where you encountered this phrase, I might be able to provide more specific insights. Buta no Gotoki Sanzoku ni Torawarete