public static function isAoKCiv($id)
    {
        return in_array($id, [
            self::BRITONS,
            self::FRANKS,
            self::GOTHS,
            self::TEUTONS,
            self::JAPANESE,
            self::CHINESE,
            self::BYZANTINES,
            self::PERSIANS,
            self::SARACENS,
            self::TURKS,
            self::VIKINGS,
            self::MONGOLS,
            self::CELTS,
        ]);
    }