During the Corinthian War, Sparta faced a coalition of the leading Greek states: Thebes, Athens, Corinth, and Argos. The alliance was initially backed by Persia, which feared further Spartan expansion into Asia. Sparta achieved a series of land victories, but many of her ships were destroyed at the battle of Cnidus by a Greek-Phoenician mercenary fleet that Persia had provided to Athens. The event severely damaged Sparta's naval power but did not end its aspirations of invading further into Persia, until Conon the Athenian ravaged the Spartan coastline and provoked the old Spartan fear of a helot revolt.