"DeactivateNation");
gcManager.addAfterListener(this, "ConstructCity",
GameChangeManager.Listening.ALL_NATIONS,
"ConstructCity");
gcManager.addBeforeListener(this, "RemoveCity",
GameChangeManager.Listening.ALL_NATIONS,
"RemoveCity");
gcManager.addAfterListener(this, "SetFieldRuledByCity",
GameChangeManager.Listening.ALL_NATIONS,
"SetFieldRuledByCity");