I spent 1,200,000 CR on Attack 4 upgrade for my artillery with russia, and this upgrade is supposed to give you increased range. I tested how much range it gives you and it doesn't do anything! my recruit unupgraded artillery get the same range as the vetteran artillery with the attack 4 range upgrade. Please FIX! i spent too much money on it to not have any effect. I played a european army that had upgraded range and he was shelling me from a way further distance than I can shell him.