Opex mean nut or hazelnut, answer is HAZEL, you are welcome ?

Who is the bright mind that selected the theme on the page with that puzzle? really brilliant idea, try to do it more black in order not to see really anything....

Yeah, really nice, but what I have from those stars, if I can not select territory to attack and defense? when I need only 5 stars, than vote, and only then go for 40+