dodecapolis
Noun
Meaning
dodecapolis (plural dodecapolises or dodecapoli)
A group or confederation of twelve cities.
Examples
Etruscan League According to legend, there was a period between 600 BC and 500 BC in which an alliance was formed among twelve Etruscan settlements, known today as the Etruscan League, Etruscan Federation, or Dodecapolis (in Greek Δωδεκάπολις).