public static byte[] addGuildToAlliance(MapleGuildAlliance alliance, MapleGuild newGuild) {
            MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

            mplew.writeShort(SendPacketOpcode.ALLIANCE_OPERATION.getValue());
            mplew.write(18);
            addAllianceInfo(mplew, alliance);
            mplew.writeInt(newGuild.getId());
            CWvsContext.GuildPacket.getGuildInfo(mplew, newGuild);
            mplew.write(0);

            return mplew.getPacket();
        }