Cities

Overview
Cities are special objects in-game that define territory. They are used to expand a player's territory and produce units and buildings. Cities have a variety of other different functions.

Leveling up
Cities can level up. Their 'level' is displayed to the left of their name on the GUI that shows above the actual city in game. Their level is determined by the amount of food they get from resources. The higher level a city is, the more food it consumes however the higher combat values it gets.

However, you should keep in mind that if the city does not have enough food to sustain its self, which is rare, the level will revert back. This revert happens once the city's total food supply reaches -15. It will then reset to 0. If the city's level becomes level 0, then there will be a 25% decrease in the city's coins and production output.

Combat
The combat power of a city is determined by its level. Cities can become quite strong when it comes to combat values, however, newly settled cities can quite easily be taken by a single Archer or Swordsman.

Territory Acquisition
The experience output of a city determines how often it will start controlling a new tile. The amount of turns before a new tile is randomly selected is displayed in the city GUI.

When your team controls a tile, its resource yield will go to the nearest city. Players who are neutral with you cannot move inside your territory.

Resources
Cities have a resource yield which is displayed in the city GUI. The amount of resources a city acquires each turn is determined by the amount of tiles that it controls and the resource output of those tiles.

Production
The city will earn production points each turn and these points will be stockpiled within the city. The amount of points in a city is visible on the GUI above the city. You can also view this in the city GUI when it is selected.

You can use these production points to build buildings and units in the production tab. To open the production tab, click the large button labeled 'Production' in the city GUI.