Insignia Description
A gold color metal and enamel device 1 3/16 inches (3.02 cm) in height overall consisting of an octagon, issuing from the top a white wedge shape between two black areas each surmounted with a gold sea lion facing outward, and extending in base over an oriental blue area charged in the center with a gold Philippine sunburst, all above a gold scroll of three sections inscribed in sequence, "SECURITY TRUTH ALLIANCE" in scarlet letters.

Symbolism
The two sea lions allude to the unit's New Guinea and Luzon Campaigns in the Pacific area during World War II.  The Philippine sunburst symbolizes the organization's Philippine Presidential Unit Citation for service on Luzon.  The octagon refers to the number "eight," which in numerology stands for perfect intelligence.  The colors black and white symbolize day and night vigilance, while gold, the color of the farseeing sun, which appears bringing light out of an inscrutable darkness only to disappear again into darkness, stands for intuition.  Oriental blue is a color used for intelligence and security.

History
The distinctive unit insignia was approved on 1 February 1972.

Source: The US Army Institute of Heraldry