The Travaux Préparatoires of the Crime of Aggression contains a complete documentation of the fifteen years of negotiations which led up to the historic adoption of the amendments to the Rome Statute of the International Criminal Court at the 2010 Review Conference in Kampala. Arranged chronologically, it includes all relevant official Chairman's drafts, non-papers, country proposals, meeting reports and summary records, as well as selected unpublished materials and transcripts from the dramatic negotiations at the Review Conference. Three introductory articles, each written from the perspective of an insider, put the Kampala compromise into context and explore the amendments on the crime of aggression, their negotiation history and the intentions of the drafters.