Foreign fighters during the Soviet invasion of Afghanistan did not play a big role in the actual conflict. However, they did develop critical skills and networks during this time that allowed some of these individuals to disseminate radical ideology and technical know-how, join in other jihadist conflicts, and establish terrorist organizations which severely impacted global security. By examining the post-conflict roles of foreign fighters in Afghanistan, it is possible to see potential paths that can be taken by foreign fighters currently in Syria and Iraq. Taking into account contextual changes, it is possible to use this information to assess the risk of post-conflict foreign fighters from Syria and Iraq on global security. Due to the technological and social changes, large swaths of ungoverned territory and the sheer number of fighters, the foreign fighters leaving this theater will be a risk to global security particularly in regions that lack the resources to monitor returned fighters.