Greetings quarterscalers!

If any of you model modern then you might like to know that Atlas model railroad has a 1/48 45' Refrigerated Trailer in MERDC.

Features Include:

True 1/4" dimensions and details
Refrigeration unit and fuel tank
Two sets of landing gear- fully extended or retracted
Working doors, bars, latches
Movable wheel assembly
Colorful painting and lettering
Adjustable hitch pin

http://railroadmodeling.kitmaker.net/news/14956

In model railroading that is what is called a Foosby, Its not likely based on any real prototype. I don't think the Army ever used them. But as they also say in Model Railroading, If you look hard enough you'll find a prototype for everything.