Each civilization produces citizens of its own nationality, a characteristic that persists until assimilated into another nationality. Foreign Nationals When a city is captured, this can create a city controlled by one nationality, but populated by another. These citizens are called foreign nationals. Foreign nationals retain their team colors so they can be easily identified. Having a city with foreign nationals is not a problem unless you are at war with the nation that originally produced them. When at war, foreign nationals become unhappy more quickly than others and are more likely to be affected by hostile propaganda from their mother country. Captured workers and settlers retain their original nationality as well, and, if ordered to join a city, become foreign nationals within that city.