isopoliteia

An isopoliteia () was a treaty of equal citizenship rights between the poleis (city-states) of ancient Greece. This happened through either mutual agreement between cities or through exchange of individual decrees. It was used to cement amicable diplomatic relations. The Aetolian League was a unique case of a larger political entity which granted isopoliteia treaties. Sympoliteia goes further, merging the governments of two or more poleis.

==History== There are many examples of this, such as a pact between Miletus and Cyzicus from approximately 330 BC which recorded their eternal friendship. On other occasions the treaties had a limited duration and had to be renewed, such as a treaty between Miletus and Phygela from the end of the fourth century BC, which renewed the isopoliteia between them. A colony could also be granted an isopoliteia from its mother city, like Kios obtained it from Miletus in ca. 228 BC.