- Apr. 1, 2009
Reorganization of the Joint Chiefs of Staff - 3 Headquarters + 4 Offices
- Jan. 1, 2006
Reorganization of the Joint Chiefs of Staff - 4 Headquarters + 2 Staff Sections + 4 Offices
(Expansion: 20 departments, Reduction: 2 departments) - Jun. 30, 2001
Reorganization of the Joint Chiefs of Staff - 4 Headquarters + 4 Offices