United States Air Force Grade Insignia Since 1947 by Preston B. PerrenotTable of Contents Revised in 2011. A detailed look, in color plates, at the insignia of grade worn by officers, enlisted personnel, and cadets of the United States Air Force since its creation in 1947. Included, is the grade insignia worn by officers, enlisted personnel and cadets of the Civil Air Patrol (U. S. Air Force Auxiliary) since its creation in 1941. Includes combat and fatigue uniform grade insignia as well as aviation cadet and officer