- This topic is not unique to Teenage Mutant Ninja Turtles, and its in-story notability may be too oblique for it to have its own complete article on Turtlepedia. For more information on this topic, see its corresponding article on Wikipedia:
- This page may contain a small amount of trivia describing what significance it does have to TMNT. If this topic gains enough in-story significance, it may be converted into a normal article.
- In After the Bomb, originally a dystopian future supplement for the tabletop role-playing game Teenage Mutant Ninja Turtles & Other Strangeness by Palladium Books, most of the land corresponding to the real-life state of Delaware would become part of the independent predominantly mutant country of Cardania.