No, the way they are visualized is that more and more small factories start appearing spread over the state the higher your level is on the state.
I'll be playing during vacation so there is a little chance for some bonus AAR perhaps
#1 wait for combat diary
#2 its linear, and on division levl its as you say. no tanks, no benefit
#3 not right now, but may happen in the future at some point
1. That would be awesome. Even better would be, if you record that gameplay and post it whole with your commentary.
2. I would also love to see that feature.
Please please! As long as it doesn't slow you down in any way!
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