This important study of the shifting diplomatic efforts around the response to and resolution of the Vietnamese invasion of Cambodia is based on the records of the Ministry of Foreign Affairs of Singapore, a key player in the complex diplomacy in the region at the end of the Cold War. The study provides a detailed account of the policies and decision-making of Singapore, as well as the diplomatic maneuverings of the other major parties and powers involved in the Cambodia conflict. It details one member country’s input into the process of defining and developing a collective ASEAN position, a process which was formative for future diplomatic efforts by the regional grouping. Ang makes use of a variety of sources contemporary to the period under study, as well as records which have become available post-1991. The use of detailed records from one of the Southeast Asian players is a first for the study of the region’s diplomacy. The book describes Singapore’s role and illustrate how Singapore’s management of the Cambodian issue was shaped by the fundamentals of Singapore’s foreign policy. The account also reveals the dynamics of intra-ASEAN relations, as well as ASEAN’s foreign relations in the context of the Cambodia problem.