This Air Force Organizational Structure depicts the various groups that make up the Air Force. The service's tiered command organizational structure aids in managing Airmen and their efforts to organize, train, equip, and execute military capability while also effectively caring for individuals and their families. This Air Force Organizational Structure is based on functionality and geography. There are twenty-five NAFs, also known as tactical echelons, that provide operational leadership and supervision to the functional units. A numbered Air Force is typically assigned for geographical reasons and is only used during wartime. During peacetime, they usually consist of a small number of headquarters personnel whose job is to prepare and maintain wartime plans.