Regional security regimes occupy the important space between the behavior of individual states and the global collective security regime provided by the United Nations. As regional intermediary organizations with limited capabilities, these regimes will have an important role to play in the dynamic post-Cold War period. The Conference on Security and Cooperation in Europe (CSCE), as the most prominent example of a regional security regime, will still be a useful precedent from which to borrow. Since 1989, the CSCE has undergone a transformation. The CSCE’s three basic endeavors appear pertinent to East Asian concerns: development of confidence-building measures; regional consensus building; and establishment of a regional, multilateral forum. East Asia should examine non-European experiences as well as the CSCE, such as the Declarations of Ayacucho, which sought to limit conventional arms and build confidence among the Andean nations and other Latin American states.