This book offers, at the same time, an imperial history of a region (Northeastern Central Asia under the Achaemenids) and the regional history of an Empire (how the Persians adapted their strategies of governmentality to a geographically challenging, ethnically diverse, and politically impervious space). Bringing together evidence from literary texts, archaeology, and ethnohistory, it crafts a new narrative of Central Asian history in which local actors in and outside the imperial territory are given as much, if not (at times) more agency than the King of Kings and his satraps in heralding Central Asia's first Age of Empires.