The League of Corinth was a federation of Greek states created by Philip II of Macedon during the winter of 338 BC/337 BC to facilitate his use of Greek military forces in his war against Persia.

The major provisions were:

  • Member states' constitutions in force at the time of joining were guaranteed.
  • The Synedrion, or congress of representatives, was to meet at Corinth.
  • The League would act to prevent any acts of aggression or subversion against any member state.
  • The League would maintain an army levied from member states in approximate proportion to their size.
  • Philip was declared commander of the League's army.

In addition to the provisions of the League, Philip garrisoned soldiers in Corinth, Thebes, and Ambracia. He was powerful enough to impose these measures because he had just defeated an alliance of Theban and Athenian forces at the Battle of Chaeronea.