Sri Lanka's long-running separatist war, which began in 1983 and lasted for 26 years, ended with a military victory for the government armed forces in 2009. Although the likelihood of a return to organized armed conflict remains slim and the country has seen its economy expand significantly, grievances from minority groups remain, and new societal conflicts have emerged. The Tamil separatist conflict was not the first instance of armed conflict in the post-colonial period: in 1971 and between 1988 and 1989, a youth-based movement in the south of the country, the Janatha Vimukthi Peramuna (JVP, lit. People's Liberation Front), staged two insurrections against the state. This entry analyzes a variety of international, regional, and local efforts to address these conflicts, using a detailed historical analysis of the varied waves of peacebuilding interventions to explore some of the limitations of global categories such as liberal and illiberal peacebuilding in the Sri Lankan context. In doing so, it highlights some important analytical biases that inform existing scholarship on peacebuilding in Sri Lanka.