"The Army of the Caesars" offers a comprehensive analysis of the Roman professional army during the imperial period. With a strength of 400,000 to 500,000 soldiers, this army was responsible for a variety of tasks that went beyond mere warfare. It acted not only as a military force in conflicts but also took on functions that are today performed by police and customs authorities. Additionally, Roman soldiers were involved in construction projects, highlighting their role as architects and contractors. This scholarly book is aimed at researchers, students, and reenactment groups, providing an accessible presentation of military archaeology with numerous illustrations, some of which are published for the first time.