Since the first edition of this book was published in 2010, United Nations peace operations have evolved significantly. In the Democratic Republic of the Congo, Central African Republic, and South Sudan, UN peacekeepers are now engaged in building peace by fighting non-State armed actors, and must consider issues concerning the application of law and policy governing the use of armed force when protecting civilians. In addition, the UN and its peacekeepers are increasingly being held to higher standards of accountability to ensure that their engagement with local forces and populations meets normative requirements found in international humanitarian law and international human rights law.This extensively revised edition of Documents on the Law of UN Peace Operations addresses the key normative principles, rules, and standards that have been a part of this evolution. The book provides essential documents, accompanied with commentary, which identify and explain the legal framework or applicable legal norms involved in the planning, management and conduct of UN peace operations. Topics covered include obligations under international humanitarian law, human rights law, international criminal law, and privileges and immunities. Special attention is also paid to matters such as accountability, the rule of law, and the protection of civilians.