The Corinthian War was an ancient Greek conflict lasting from 395 BC until 387 BC, pitting Sparta against a coalition of four allied states, Thebes, Athens, Corinth, and Argos, who were initially backed by Persia. The immediate cause of the war was a local conflict in northwest Greece in which both Thebes and Sparta intervened. The deeper cause was hostility towards Sparta provoked by that city's "expansionism in Asia Minor, central and northern Greece and even the west".