&& cityReader.getCityID(field.getPosition()) != null) {
Messages messages = Messages.getMessages();
messages.info("ConstructTestCityAction", "CityAR",
"You can't build more than one city on a field!");
} else {
Nation activeNation = Game.getGame().getActiveNation();
if (activeNation != null) {
ConstructCity newCityChange
= new ConstructCity(field.getPosition(),
Game.getGame().getActiveNation());
newCityChange.execute();