Insignia Description
A Silver color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Per fess abased Argent and Azure (Teal Blue), in chief a Red fox’s mask Proper charged on the forehead with a billet fesswise Sable, and in base a key palewise between two stylized lightning flashes of the first. Attached below the shield a Silver scroll inscribed “LOYALTY, VIGILANCE, PRIDE” in Black letters.

Symbolism
The colors, white and teal blue, are symbolic of the battalion’s former status as an unassigned-to-branch unit. The battalion’s war service as a Signal unit is shown by the colors of the fox’s mask and background. Intelligence functions of the unit are represented by the censor’s stamp on the fox’s mask. The key is for the first battle honor (Normandy) of World War II and also alludes to Signal and Intelligence Battalions. The lightning flashes symbolize radio reconnaissance and the five charges are for the five battle honors of the unit.

History
The distinctive unit insignia was originally approved for the 302d Communications Reconnaissance Battalion on 16 July 1956. It was amended to change the date of the authority for approval on 5 December 1956. It was redesignated for the 302d Army Security Agency Battalion on 19 March 1957. It was assigned for use to the 318th U.S. Army Security Agency Battalion on 2 August 1965. The use of the insignia by the 318th U.S. Army Security Agency Battalion was revoked on 13 March 1975. The insignia was redesignated for the 302d Military Intelligence Battalion and its symbolism amended to reflect Intelligence Battalions on 19 October 1983.

Source: The US Army Institute of Heraldry