I love seeing real versions of models that I have in HO scale. In some ways this museum is like the Roco Minitanks / Paul Heiser Museum. There are some notable exceptions. This US Army 75mm Mountain Howitzer is one of them. This little gun was used before WWII and until a few years afterwards. It was towed by Jeeps, carried by mules when broken down into bits, and also towed by horses. It could be broken down into small parts and had both rubber tires or wooden spoked wheels.
Take note of the panels that gun is sitting on. It is Marston Matting. Perforated Steel Planking, PSP. It could be linked together to make a muddy field into an airfield in a few hours.
LVT IV, a tracked landing craft used in Normandy and all over the Pacific. Another one we did not get from Roco.