This book investigates demobilisation, disarmament and reintegration (DDR) in Colombia during the twentieth and twenty-first centuries. The six large peace processes and amnesties that took place in Colombia over this period were nation-led, providing an interesting case study for the wider DDR literature, which has historically focused on Africa and Asia. The continuous process of creating and demobilising illegal armed groups has been pivotal in building the Colombian state. Although the peace settlements and amnesties have brought renewed cycles of violence, they have also been key to the negotiation of democracy and citizenship rights for both ex-combatants and wider sectors of the population. Here the author analyses the role of DDR programmes in building state and citizenship. Comparing DDR during Alvaro Uribe's presidency and the peace process with the FARC guerrilla under the presidency of Juan Manuel Santos, the book draws on extensive fieldwork conducted with local authorities, officers on the ground and ex-combatants themselves. It details the process of creating and implementing DDR policy and explores the difficulties, challenges and security dilemmas ex-combatants may face in integrating within a post-conflict society in social, economic and political dimensions. Bringing us right up to date with the implementation of the FARC's peace process and the challenges ahead in the reintegration of ex-combatants under a new president, this book will be of interest to scholars and researchers of politics and development in Colombia, and to those with an interest in peace-building, state-building and DDR in other countries and conflicts.