Lewistown Montana, which I recently went through, has a nice assortment of public monuments, several of which I missed, including a veterans park. Therefore, this is only a selection of the monuments that are located there.
The Fergus County Courthouse has a nice selection of monuments, at least one of which I was too hurried to photograph. This one is probably a post WWI vintage monument, but recalls the veterans of all wars.
This is the first time I've seen a memorial of this type. It's to Pioneer Freighters of Central Montana.
This is a park in Lewistown, which appears to feature retired heavy ordnance. The gun appears to be a 155 Long Tom of WWII vintage, while the missle is a Minuteman, I think.