This is part of my M-7 Priest battalion. WWII US Army self propelled artillery.
Each Priest has an M-10 ammo trailer to carry ammunition. These are resin Priests that I got years before Roco came out with theirs. These are from Crusader Models.
Each of my battalions has the support vehicles for it, to include supplies and mess facilities.
These Paul Heiser Models Jeeps are the fully enclosed canopy version. It gets cold in Europe in the winter and those in the rear with the gear can use an enclosed canopy. The truck has on of my many palletized cargoes. I have loads of them from Fidelis Models, and a few others. I then supplement them with some I make myself.