a nicely done panzer, Robert!
I think however that there are some things that hit me as being incongruous, and I point them out so that you might take these into consideration on your next dio.
The setting strikes me as probably Spring?--the ground is really muddy, and will remnants of snow still to be seen, (as in a Spring thaw), yet you have green, fully-leafed vegetation in the scene? It just doesn't strike me as appropriate to the setting?
Additionally, although it looks like a scene of warming temperatures, the gunner figure is portrayed absolutely just "buttoned-up against what looks like frigid cold--the big mittens, hood up, big furry hat, and even what looks like a hood or head scarf. Again, this strikes me as incongruous with the setting.
I hope you don't take it as a dismissal of your fine efforts here; I just think that compositionally it could be a stronger diorama if all the elements were a little more carefully planned.