Since the eruption of the Arab Spring in 2011, centralized military power has broken down in North Africa, the Levant, and Yemen, and several weak Arab states have turned to local militias to help defend regimes. While these progovernment militias can play important security roles, they have limited military capacity and reliability. Transitioning militia fighters into national guard forces with formal ties to the national command structure can overcome some of these limitations, but the shift must be accompanied by a wider commitment to security sector reform and political power sharing.