Cities begin the game controlled by one side or the other, or neutral, as indicated by the color of the lettering on the map. A player gains control of a city when (a) he captures it an attack, (b) it surrenders automatically, or (c) his opponent attacks a neutral city. He then places one of his tokens (blue or yellow) on the city, to show he controls it. Exception: when you regain control of one of your native cities, just remove your opponent's token from it; there's no need to place one of your own.