Authorised 5 October 1966
On a shield 3 inches (7.62 cm) in height and 2 1/4 inches (5.72 cm) in width overall divided into three vertical stripes orange, blue and orange, the blue center stripe 1 inch (2.54 cm) in width and surmounted by an unsheathed sword, point to top, the hilt yellow and the blade forming a bolt of lightning all within a yellow 1/8 inch (.32 cm) border.
The orange field of the shield and the yellow border were suggested by the authorized shoulder sleeve insignia of the Strategic Communications Command of which the 1st Signal Brigade is a part. The lightning bolt, which also appears on the Strategic Communications Command shoulder sleeve insignia, is depicted on the distinctive insignia (badge) of the 1st Signal Brigade. In this instance, the lightning bolt, a symbol of communication, has been used as a sword blade and attached to a hilt, the sword thus referring to both the tactical and support mission of the organization. The blue vertical stripe with "sword" (suggested by the authorized shoulder sleeve insignia for the United States Army, Vietnam) alludes to the unit's numerical designation.
The shoulder sleeve insignia was approved on 5 October 1966. (TIOH Dwg. No. A-1-438)
