A boxy little* truck used to transport troops or stuff, not really based on anything IRL that I can think of. Has a "Defend" set of animations that enables the lights at the front and rear for extra razzle-dazzle.
(* It's actually quite beefy ingame tho)
Some unit editor stats:
Death time: 1.00
Death type: Can't raise, Does decay
Selection Scale: ~4.50
Beep beep!