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Delian League, mostly Greek cities of Asia Minor and the Islands, converted to the Athenian empire after peace with Persia. Peloponnesian League led by Sparta, mainly Dorian Greek cities of Peloponnesian peninsula of southern Greece.
There were several - Delian League, Peloponnesian League, Achaean League, Ionian League, Aetolian League, Beotian League etc, etc.
Athens surrendered unconditionally to the Dorian Peloponnesian League in 404 BCE.
Muslim league was formed on 20 December 1906.
James L. Brown, was the one who formed the prohibition league.
The League of Nations.
the Mohawks,Oneidas,Onondagas,and the senecas formed the league of five nations
The Ballarat Reform League was formed in 1853 to represent the interests of miners on the Ballarat goldfield.
The premiere league was formed on February 20th, 1992. Outside of England, it is referred to the English Premier League, and is a competitive league for professional football players.