III Corps, A-1-59

Description/Blazon
A blue caltrop with three points that lie on a circle of 1 1/2 inch (3.81 cm) radius with a white triangle in the center with points that lie on a circle of 3/8 inch (.95 cm) radius. The design is enclosed by a 1/8 inch (.32 cm) Army green border.

Symbolism
The triangular design represents the numerical designation of the corps. The blue and white are the authorized colors used in distinguishing flags to represent Corps.
Background
The shoulder sleeve insignia was approved by telegram on 3 December 1918. It was authorized/announced by letter dated 17 June 1922.

(TIOH Drawing Number A-1-59)

Subdued, Olive Drab, NSN: 8455-00-126-4606
  
Information & Plaques Courtesy of The Institute of Heraldry!!