Military robots in general and unmanned aerial vehicles in particular are playing an increasingly important role in the armed forces of highly technologized countries. The advantages are evident: Their deployment in dangerous situations saves the lives of one’s own soldiers, and their dispassionate precision work provides a strategic advantage. On the downside, there are concerns regarding international law, ethical objections, and potential escalation scenarios. Niklas Schörnig describes the current capabilities and proliferation of unmanned military systems and outlines the need to regulate the unchecked build-up of military robots by means of arms control policy.