Among the Greek cities which were founded at an early day in that peninsula of Macedonia called Chalcidice, from Chalcis, in Eubœa, which colonized the greater number of them, Olynthus became the most important. It long maintained its independence against the Macedonian kings, on one hand, and against Athens, when Athens ruled the Ægean and its coasts, on the other. As it grew in power, it took under its protection the lesser towns of the peninsula and adjacent Macedonia, and formed a confederacy among them, which gradually extended to the larger cities and acquired a formidable character. But two of the Chalcidian cities watched this growth of Olynthus with jealousy and refused to be confederated with her. More than that, they joined the Macedonians in sending an embassy (B. C. 383) to Sparta, then all-powerful in Greece, after the Peace of Antalcidas, and invoked her intervention, to suppress the rising Olynthian confederacy. The response of Sparta was prompt, and although the Olynthians defended themselves with valor, inflicting one severe defeat upon the Lacedæmonian allies, they were forced at last (B. C. 379) to submit and the confederacy was dissolved. "By the peace of Antalkidas, Sparta had surrendered the Asiatic Greeks to Persia; by crushing the Olynthian confederacy, she virtually surrendered the Thracian Greeks to the Macedonian princes. … She gave the victory to Amyntas [king of Macedonia], and prepared the indispensable basis upon which his son Philip afterwards rose, to reduce not only Olynthus, but … the major part of the Grecian world, to one common level of subjection." _G. Grote, History of Greece, part 2, chapter 76 (volume 9)._ ALSO IN: _E. A. Freeman, History of Federal Government, chapter 4, section 3._ GREECE: B. C. 379-371. The liberation of Thebes and her rise to supremacy. The humbling of Sparta.