NATO
The NATO structure is divided into two commands, one for operations and one for transformation. Each has a Supreme Allied Commander as highest-ranking military officer.
- Allied Command Operations (ACO) is located at SHAPE, Mons, Belgium. It is headed by the Supreme Allied Commander Europe (SACEUR), a U.S. four star general or admiral with the dual-hatted role of heading U.S. European Command. (For legal reasons SACEUR has retained the traditional title including Europe although the responsibilities were extended to all allied operations in 2003).
- Allied Command Transformation (ACT) is located in Norfolk, Virginia. It is headed by the Supreme Allied Commander Transformation (SACT), a four star general or admiral. This position is currently held by French Air Force General General Stephane Abrial.
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