* HarsherInHindsight: The Pigs use their cannon to blow up Japan, three years before [[UsefulNotes/AtomicBombingsOfHiroshimaAndNagasaki the similar things]] [[https://en.wikipedia.org/wiki/Bombing_of_Tokyo actually happened]]. As evidenced by the "Doolittle Dood It!" sign, this was actually meant as a reference to the [[https://en.wikipedia.org/wiki/Doolittle_Raid Doolittle Raid]].
* ValuesDissonance: Being a WartimeCartoon, expect plenty of disparaging jokes not only about Germans but also the Japanese, the most egregious being the "No Japs Allowed" sign.