Origin of the Joint Chiefs of Staff The Wartime Reforms The National Security Act of 1947 Organizing the Joint Staff The National Security Act Amendments of 1949 Reorganization Plan No. 6 of 1953 The Reorganization Act of 1958 Reorganization -- Planning and Actions Developments after the 1958 Reorganization Organizational Consolidation, 1968-1978 Membership of the Joint Chiefs of Staff Contains: organizational charts, Joint Chiefs of Staff membership during the 1942-1978.