This book explains the military and economic developments that engulfed the ancient Mediterranean in the late Classical and early Hellenistic periods from the perspective of labour history. It examines the changing nature of military service in the vast armies of Philip and Alexander, the Successors, and the early Hellenistic kingdoms and argues that the paid soldiers who staffed them were not just 'mercenaries', but rather the Greek world's first large-scale instance of wage labour. Using a wide range of sources, Charlotte Van Regenmortel not only offers a detailed social history of military service in these armies but also provides a novel explanation for the economic transformation of the Hellenistic age, positioning military wage-labourers as the driving force behind the period's nascent market economies. This title is part of the Flip it Open Programme and may also be available Open Access. Check our website Cambridge Core for details.