The case of Libya demonstrates the extent to which the law plays a role in enabling, shaping and constraining complex military and diplomatic operations. The law underpinned a number of decisions made at the policy level regarding military and diplomatic engagement. Although prior military operations can provide guidance for decision-making in future military operations, the application of the law to each case will be unique. The Libyan case study provides an example of how the law and politics intertwined to achieve the U.S. government’s objectives of protecting the Libyan people against violent attacks by their leader. This chapter examines the role law played in five key political-military decision points relating to the case of Libya. F...