These trucks do not have a civilian conformity standard. Or if they do, it's an American one, and no use to you.
Some people have put these trucks on the road as registered..You CAN 'put anything on the road'..But, YOU have to make the vehicle (then) 'Conform' to the required standard.
The E.U. standard at minimum, would require alteration to lights, (including Height!), Seat belts and mountings. Maybe seats, maybe windscreen glass. Brakes are are a whole other issue for
(up to) testing and plating requirements. And then the suspension comes into it as well.
People have done this, but at GREAT expense and labour etc.
Depending on the "CLASS" you intend to use in (and for), the plating requirements change yet again.
You will see vehicles running around not too much altered of the later military years, Usually in the military, Show, Historic, education and ' Camper', 'motor home' or display class.
All the above do require testing and plating, and are subject to applicable road levy fees etc.
Commercial?..(I'd say) Forget it. soz...just my 1/2 penne'th. But good luck.