Xenophon's Hellenika begins where Thucydides breaks off. This new edition comprises the section completing the history of the Peloponnesian war (411404 BC), crucial years for the history of classical Greece. The introduction gives an outline of Xenophon's life and works, of the Hellenika and its character, and an account of the chronology of the Ionian War. The commentary, the first since Underhill (1906), concentrates on historical and historiographical matters. It should prove a boon to students facing this problematical text for the first time and to scholars familiar with the period.