OT--What is this?

[Hauksbee]

I was sent a slide show of WWII Life magazine photos of aircraft by a friend. Among them was a P-47 being serviced and this small tractor was front and center. It obviously fills the same niche as the British Bren Carrier and the German Kettenrad, but this is the first time I've ever seen one. Anyone know what it's called?

[Tamper]

M2 Cletrac High-Speed Tractor

 

:)  (Not that I knew...I looked it up *lol*)