Negotiating a peaceful end to civil wars, which often includes an attempt to bring together former rival military or insurgent factions into a new national army, has been a frequent goal of conflict resolution practitioners since the Cold War. In practice, however, very little is known about what works, and what doesn’t work, in bringing together former opponents to build a lasting peace.

Contributors to this volume assess why some civil wars result in successful military integration while others dissolve into further strife, factionalism, and even renewed civil war. Eleven cases are studied in detail—Sudan, Zimbabwe, Lebanon, Rwanda, the Philippines, South Africa, Mozambique, Bosnia-Herzegovina, Sierra Leone, Democratic Republic of the Congo, and Burundi—while other chapters compare military integration with corporate mergers and discuss some of the hidden costs and risks of merging military forces. New Armies from Old fills a serious gap in our understanding of civil wars, their possible resolution, and how to promote lasting peace, and will be of interest to scholars and students of conflict resolution, international affairs, and peace and security studies.

Among the more frequent and most devastating of conflicts, civil wars—from Yugoslavia to Congo—frequently reignite and even spill over into the international sphere. Given the inherent fragility of civil war peace agreements, innovative approaches must be taken to ensure the successful resolution of these conflicts. Strengthening Peace in Post­–Civil War States provides both analytical frameworks and a series of critical case studies demonstrating the effectiveness of a range of strategies for keeping the peace.

Coeditors Matthew Hoddie and Caroline A. Hartzell here contend that lasting peace relies on aligning the self-interest of individuals and communities with the society-wide goal of ending war; if citizens and groups have a stake in peace, they will seek to maintain and defend it. The rest of the contributors explore two complementary approaches toward achieving this goal: restructuring domestic institutions and soft intervention. Some essays examine the first tactic, which involves reforming governments that failed to prevent war, while others discuss the second, an umbrella term for a number of non-military strategies for outside actors to assist in keeping the peace.