This volume explores the daily lives, security measures, and health practices in the borderland regions of the Ottoman Empire and its successor states (1700–1939). With contributions from early-career and senior scholars, the book examines the complex dynamics of these frontier zones, covering regions in the Middle East and Southeastern Europe. It delves into how local communities navigated imperial control, national borders, and quarantine systems, revealing the intersections of public health, military strategies, and border security. By focusing on these marginal areas, the book provides fresh insights into imperial legacies, state formation, and the challenges of governance in the (post-)Ottoman world.