Pretty cool. The type of trailer for the military is M716 or M762 and with the surge brakes, the probably a A1 model. It was the basis for the M416 military trailer. It was designated as a small generator trailer, but was adapted by military transport for hauling what could be bolted down or strapped down. All parts are still readily available too.
97 TJ SE lifted, locked and rubbered for fun
94 YJ SE stock, 225s, Trail Tested