Sealand is a small offshore oil platform constructed during WW2 and promptly abandoned in International Waters. A British Radio operator, Mr. Roy Bates, claimed dibs on it and siezed it as his home, declaring independance as "Sealand". He opened fire on construction workers who entered the waters and was brought to court in Britain, where it was determined they were on his property inside international waters and therefore tresspassers. While he was away in Britain, a German lawyer hired a group of Dutch Mercenaries to attack the platform on Jetskiis and Speedboats. They took his son hostage and held the island. Mr. Bates had suspected something like this would happen, and stashed automatic weaponry that would be considered illegal in mainland Europe or Britain. The son obtained these weapons, and took the pirates as hostages at gunpoints. When Mr. Bates arrived, he released all mercenaries with a warning, but held the lawyer in prison. He stated that he had commited "Treason against Sealand" and that he would serve a lifelong prison sentence unless Sealand was paid a $35,000 USD fee. Germany asked Britain to address it as a hostage situation, but they replied by stating it was no longer their property or in their waters. Germany sent a team of ambassadors to Sealand via helicopter, where they debated about the release of the prisoner. Eventually the man was released, and nobody dared invade Sealand again. Mike, Roy's son, was named Prince of Sealand, for saving it from the pirates. In 2012, Mr. Bates passed away, leaving Mike Bates as his heir, the King of Sealand.
It's a pretty crazy country and anyone that picks Nigeria over it is a fool.