The Spartan fleet captured Samos, but an Athenian army under Iphicrates defeated a Spartan army at the Battle of Lechaeum. Evagoras revolted from the Persians in Cyprus.
Dionysius I of Syracuse conquered southern Italy (Magna Graecia), crushing the Italiote (Greek) League at the Battle of the Elleporus (388) and destroying Rhegium (386).
The Athenian navy under Thrasybulus recovered Thasos, Samothrace, Tenos, the Chersonese, Byzantium, Chalcedon, and other cities. Garrisons were placed in the more important towns and a 5 percent harbor toll levied.
THE KING'S PEACE. The Spartan Antalcidas negotiated a general Greek settlement with Persia. All the Greek cities were to be autonomous except those in Asia, which were to belong to Persia.
The Spartan navy forced Athens to accept the King's Peace by blockading the Hellespont; Thebes was frightened into accepting. The Boeotian and the Athenian Leagues were temporarily dissolved.
After an appeal from King Amyntas of Macedonia, Sparta went to war with the Chalcidian League, which was led by the city of Olynthus. A Spartan force of 10,000 marched north and while in Thebes seized the citadel (Cadmea) and turned it over to the oligarchic party. The democratic party fled to Athens. When the Spartans reached the Chalcidice, they were defeated by the League's army.
A second Spartan expedition, under King Agesilaus, marched to Olynthus. After a long siege, during which Agesilaus died, the city was captured and the Chalcidian League dissolved (379).
Theban democratic exiles led by Pelopidas returned from Athens, recovered the Cadmea by a stratagem, and established a democracy at Thebes. Two Athenian generals who aided the Thebans were executed by Athens for operating without authority. The Spartans did not intervene but left Sphodrias with a garrison at Thespiae. Sphodrias, also operating on his own, raided Attica, but was not punished. In response, Athens allied itself with Thebes against Sparta.