For certain Governments, such as Communism, Fuedelism, and Facism, there could be an option if you kill an enemy, you have the ability to capture them and bring them back to town which creates HAPPY FACES. You will have to pay a small upkeep for them. If the person you captured them from, takes over the city, they re-gain control of their units. If it was a Swordsman, it would be taken back as on and regained as one. The person who captures them cannot use them to attack.