ComStar

12th Army V-Beta

The Broadsword and Shield

The Com Guards simply paint their vehicles white for official occasions and use appropriate camouflage for combat.

Per FM: ComStar, page 17.
Other references:
Black Knight, FM: Comstar (plate 2)
Color Scheme
Insignia
The insignia of the Twelfth Army shows a shield propped up on a broadsword. Per FM: ComStar, page 42.