On a red nonagon whose points lie on an imaginary circle 2 1/2 inches (6.35 cm) in diameter, a white letter "A" within the outline of a rosette figure of four petals, all white.
Red and white are the colors associated with armies. The nine-sided figure indicates the numerical designation of the organization.
The shoulder sleeve insignia was approved on 21 September 1944. (TIOH Drawing Number A-1-362)