when somebody builds Sun Tzu / free barracks on some other continent , actually in the middle of that continent and actually the capital of the most powerful Al in the game , that's about 20 units ı would have pay upkeep for until ı make there in about 100 to 200 turns . lt doesn't expire in the scenario ı stick to , ı wouldn't build barracks on many of the 20 cities my continent , with just one city left to capture , but with 20 gpt ı could hire two Als to fight the number one Al and like it might have upto 10 000 gold for the remainder of the game , with which he might buy 2 or 3 techs from others . Wonders are good if you have no rush . F7 button gives you some happiness too , when it is your colour that dominates the screen .