In my experience, with 1upt, the old adage is true: less is more. You don't want to have too many units because then they just block each other from moving. So what is the best/optimal number of units needed to take a city? And what units do you use? I would say no more than 5 units if you are going up against a walled city. Something like 2 swordsman, 1 archer and 1 catapult is right. After nationalism, when you get armies and corps, no more than 3 "armies". Say 2 infantry armies and 1 artillery army is good in the modern era. Am I right?