A discussion of Late Classical and Hellenistic fortifications in Magna Graecia, looking in particular at those of southern Italy, excluding Sicily. The first in a new series of studies that present archaeological and historical research on the wider field of military matters, this volume combines a short narrative of military events during the 4th and 3rd centuries BC, with a detailed study of fortifications in cities such as Taranto, Metaponto, Crotone, Velia and Paestum. Italian text.