CENTAG wartime structure in 1989

The Central Army Group (CENTAG) was a NATO military formation comprising four Army Corps from two NATO member nations comprising troops from Canada, Germany and the United States. During the Cold War, CENTAG was NATO's forward defence in the southern half of the Federal Republic of Germany (FRG). The northern half of the FRG was defended by the four Army Corps of NATO's Northern Army Group (NORTHAG). During wartime, CENTAG would command four frontline corps (II German, III German, V US, and VII US). Air support was provided by Fourth Allied Tactical Air Force.

In addition to these forces, the French Forces in Germany (made up of the I Corps and II Corps) were associated with the Army Group. In 1966, France had withdrawn from the NATO Command Structure, but it still wished to take part in the defence of Western Europe. A series of secret US-French agreements made between NATO's Supreme Allied Commander Europe (SACEUR) and the French Chief of the Defence Staff detailed how French forces would reintegrate into the NATO Command Structure in case of war. At the outbreak of hostilities, the French First Army would be placed directly under the command of Supreme Headquarters Allied Powers Europe (SHAPE), which would employ the three corps' of First Army as needed. Three armored divisions of the First Army were based within Germany and held yearly maneuvers with their allies to train for the moment French units would be committed to CENTAG (see also: Structure of the French Army in 1989).

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