Ancient Greek city states
Corinthian Association
The Corinthian Commonwealth was a union of ancient Greek city-states under the command of the Macedonian king Philip II.
The Corinthian association was formed because of the campaign of the Greek states against Persia at the turn of 338-337 BC. Philip gained command of the Society at the Battle of Chaironeia in 338 BC, when he defeated both the Theban and Athenian armies.
The Corinthian Society was also to protect the member states against foreign states. Sparta, for example, had long been outside the association, but after its defeat at the Battle of Megalopolis in 331 BC, it too had to join.
Interestingly, the name of this association was not invented until modern historians.