The need to rebuild the security infrastructure in a postconflict state is of paramount importance for ensuring a durable peace. This chapter examines the complicated tradeoffs parties face sharing and/or reestablishing the monopoly of force, including when sharing force with the international community; the questions of the consent of the state, and often the consent of the nonstate parties; the nature and configuration of the international forces, including the command structure of the international forces; and the mandate of those forces. The chapter also analyzes cases during which the state seeks to integrate nonstate armed actors into the national forces, when parties are faced with the questions of how best to provide for the disarmament, demobilization, and reintegration of nonstate forces, coupled with security sector reform for the national forces. The chapter additionally examines the questions that arise when the state seeks to restore limited control over the monopoly of force by permitting nonstate actors to come under the umbrella command of the national forces, including to what extent to promote some degree of integration among special units of the state and nonstate forces, as well as a timeline for the eventual integration of forces.