Book excerpt: Operating from outside their homelands, exile armies have been an understudied phenomenon in history and international politics. From avoiding the fate of being a mere tool for a patron power to facing issues regarding their military efficacy and political legitimacy, exiled armies have found their journey home a tortuous one. This collection of essays covers the experience of exiled forces in the Second World War, principally in Europe, and also covers their activities around the globe during the Cold War and beyond.