For some context I was playing a game called Company of Heroes 2 and right after my game finished I checked Call of War. Then I thought of something, a unit veterancy system. Maybe after a single unit gets 1 kill it gets 1 percent more damage then 2 kills for 2 percent, 3 kills for 3 percent, all the way up to 5. Then if a single unit gets 10 or maybe 15 kills it gets a 10 percent damage boost. I think this system could improve strategy by rewarding players who preserve their units and take minimum casualties. It would also improve solo play because solo players could better overcome the large waves of enemies they'll have to fight from full coalitions by using a well balanced and experienced army. You may be thinking that if you stack units you could get an easy damage boost But I don't think that's the case because if you have a stack of lets say 10 battleships with 59 kills if you take one battleship out it will have its own number of kills. Therefore the game could calculate how much kills each single unit has and apply the veterancy to each unit.
So yeah that's my idea thanks for reading.
So yeah that's my idea thanks for reading.