A shield 3 inches (7.62 cm) in height and 2 inches (5.08 cm) in width overall; within a 1/8 inch (.32 cm) white border three vertical stripes yellow, blue and red, on the center blue stripe a sword pointing upward, blade white and handle yellow.
Yellow and red are the colors of Vietnam. The blue center represents the United States, together with the sword it alludes to the U.S. Military in Vietnam.
The shoulder sleeve insignia was approved on 10 February 1966. (TIOH Dwg. No. A-1-408)