Faced with the need to establish unified command of US military forces in peacetime, the Joint Chiefs of Staff in 1946 created an organizational directive, the "Outline Command Plan," which was the first in a series of documents known as Unified Command Plans. Approved by the President, the Unified Command Plan prescribes high level command arrangements for operational forces on a global basis; its structure and the organizational philosophies that structure represents have had a major impact on US military operations in the post-World War II era. Thus the history of the Unified Command Plan is a useful guide for those engaged in the development of current military policy and strategy as well as an important reference for students of US policy and strategy during the Cold War. The History of the Unified Command Plan, 1946-1993, covers the formulation of the plan, modifications, and periodic revisions. This volume is a compilation of three separate histories which were originally classified.