Brilliant, you should try to make the enemy's side and then put both sides together in a "war" diroma. Try to put some more pictures up on MOC if you can.

i think there are a number of things you could do to inprove it. 1) instead of black tracks, make them brown. 2) some of the guys's shirts aren't great. like the guys wearing ties. i get that you want them green for a kinda of camo like look, and thats cool. just change some of those shirts. 3) finally, i think the tank is a little plain. and it also seems slightly too wide. other then that, its a good start to a diorama with lots of potential.