If you did not previously own a city and your units occupy that city at the END of your turn, that city transfers to your control. You can then build at that city, if you have enough goods there, and that city will produce goods based on it’s surroundings. Do not confuse this with emissarying units. You can not emissary cities. If you move all the units you emissary off a city, and none of your units occupy that city, it remains neutral, though temporarily unoccupied. Note: this does not cover the strategy in taking a city held by an enemy.
Boarding Ships
Units that are ships may be boarded. It costs 3 move points to board a ship. You can either board a ship in the same square (usually a city) as the unit, or you can board a ship sitting just off off shore by moving onto it. Once on a ship a unit spends no movement and will move with the ship until the unit Disembarks from the ship. Again you may Disembark by moving from a ship to an adjacent land square.
