that looks like the flag of the People's Republic of China for sure. It's a little weird it's blue haha

the tanks looks like a Bt-7

I take it this was from the Game Awards trailer, so probably.

This makes me also want to test out if it was actually true that boarding your land units onto a ship unit would make the movement of the overall unit group remain the same as the ship's original movement. 'cause I'm under the impression that was not the case in the Stadia demo.

Changlini wrote:

I take it this was from the Game Awards trailer, so probably.

Nah, the screenshots are from the steam page. They changed all of the photos after the trailer was shown at the game awards. If you check there you'll also find some new art for the English. 

How can we exclude Union of Soviet Socialist Republics, People's Republic of China and United States of America in Contemporary era?