Thanks Tahnoak your comment is one of the most helpful for the scene...
1) You're right... fixed
2) Adjusted the scele
3) You are right, maybe I need to create some objects that represents other nations involved, but for composition 1 I'll keep the flag...
4) I don't know but is strange, for some reason I think that the light aren't casting shadows, I'm using Noon Light of the library, I just modified the angle and the color a little.
5) I didn't understand it completely, I soiled it a little in my last pic, do you saw?
I really appreciate this comment, thank you very much!
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Finis your comment also is great and really improved the scene, thank you.
I make the pole less thick and I agree with you that it looks like a toy before, but I was not sure if was the flag. I create a low-poly depot, where the flag now stay.
The DOF is to strong, I agree. Now I make it a little more smooth, and how can I make something like fog/smoke... to looks like a low mist?
Will work on more objects for the next composition.
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Ok I had the opportunity to work slowly this weekend, I fixed some problems and put some improvements that Tahnoak and Finis suggested, thanks again, now I'll work in the final details... like the sky and some foot prints and hand prints, I did some tests with it and the hand prints is almost invisible so I don't think that I'll add it, but the footprints are on the way...
As I said before, I create a low-poly depot (Finis suggestion), an broke vehicle, wire and barricades (Both Breech suggestion), worked on the scale ( Tahnoak and Finis suggst).
Tons of suggest are always welcome

Be the change you want to see in the world. - Mohandas Gandhi