Foreign Fighters : Oxford University Press : 9780190691899 : 0190691891 : 15 Jun 2017 : In conflict zones around the world, the phenomenon of foreign insurgents fighting on behalf of local rebel groups is a common occurrence. They have been an increasing source of concern because they engage in deadlier attacks than local fighters do. They also violate international laws and norms of citizenship. And because of their zeal, their adversaries - often the most powerful countries in the world - are frequently incapable of deterring them. Foreign Fighters have made headlines in recent wars in Afghanistan, Iraq, and Syria, and the term is widely equated with militant Islamists. However, foreign fighters are not a new phenomenon. Throughout modern history, outside combatants have fought on behalf of causes ranging from international communism to aggrieved ethnic groups. Analyzing the long history of foreign fighters in the modern era helps us understand why they join insurgencies, what drive