401. Cyrus the Younger commences his expedition into Upper Asia to dethrone his brother Artaxerxes Mnemon. He takes with him an auxiliary force of ten thousand Greeks. He is killed in battle at Cunaxa, and the ten thousand, led by Xenophon, effect their retreat in spite of the Persian armies and the natural obstacles of their march.
399. In this, and the five following years, the Lacedæmonians under Agesilaus and other commanders, carry on war against the Persian satraps in Asia Minor.
396. Syracuse besieged by the Carthaginians, and successfully defended by Dionysius.
394. Rome makes her first great stride in the career of conquest by the capture of Veii.
393. The Athenian admiral, Conon, in conjunction with the Persian satrap Pharnabazus, defeats the Lacedæmonian fleet off Cnidus, and restores the fortifications of Athens. Several of the former allies of Sparta in Greece, carry on hostilities against her.
388. The nations of northern Europe now first appear in authentic history. The Gauls overrun great part of Italy and burn Rome. Rome recovers from the blow, but her old enemies the Æquians and Volscians are left completely crushed by the Gallic invaders.