Railway Ambush Aftermath

The aftermath of a recent battle viewed from afar.
The task was to show atmospheric perspective, and while I could have achieved it better with this piece, I'd say it was a valiant attempt.
The landscape is actually based on 2 maps from 'World of Tanks' merged into one (those maps being 'Malinovka' and 'Prokhorovka'), and the tank in the foreground is an RU 251.
I'm actually really happy with how the distant tanks look, only using basic shading for detail. There is some very discrete photo-bashing if you can see it. The smoke is what could have the greatest improvement as it currently just looks like a black smudge.