'''Airdate:''' July 12, 2000

A trip to city hall reveals that Peter's house is not on the Quahog map, so Peter (who has had it with the government not giving him a tax refund and telling him he can't build a pool around his house) decides to declare his house his own country -- which causes an international crisis when he invades Joe's backyard pool.
----
!!"E. Peterbus Unum" contains examples of:
* BuxomIsBetter: Susan Sarandon in her [[BigLippedAlligatorMoment out-of-nowhere]] appearance.
-->'''Susan Sarandon:''' For less than the ticket price of one of my movies about capital punishment or neo-feminism, you can make sure that Stewie never goes hungry again.
-->'''Stewie:''' Yes, and from the look of those sweater cows, so could you.
* DiplomaticImpunity: "Just like the bad guy in ''LethalWeapon2''/I've got diplomatic immunity, so [[MCHammer Hammer]] you can't sue."
* DistantFinale: The episode turns out to be a video shown to a class 200 years in the future, where one of the students [[AudienceSurrogate asks if anyone understands Stewie]] (which was a common fan question. According to commentary, people do understand what Stewie says, but, because he's a toddler, they don't take him seriously).
* EarlyBirdCameo: When Lois tells Peter that a swimming pool is one of those things the family doesn't really need, we get a flashback of the last time Peter brought home something the family didn't need: another talking dog, who looked and sounded like a CampGay Brian. That dog would later be Brian's cousin, Jasper.
* {{Egopolis}}: Petoria.
-->'''Peter:''' I was gonna call it "Peterland", but that gay bar down by the airport already took it.
* KarmaHoudini: Played with and subverted. Peter believes because he's technically the president of his own country he can't be tried in America, it works until he decided to take over Joe's pool.
* LandOfOneCity: more like Land of One House.
* PrisonRape: Quagmire mentions that Peter might go to jail for taking his beer mug outside, and not the good jail you see on Cinemax, the "man" jail.
* ShoutOut
** [[AsGoodAsItGets "You're why cavemen painted on walls"]].
** Lois' "first lady" outfit is based on that of Jackie Kennedy.
* YouAndWhatArmy: When Chris tells Peter that someone's blocking the fence, Peter asks "Him and what army?". Chris replies "The ''U.S.'' Army".
-->'''Peter:''' [[OhCrap Oh, that's a good army.]]