public static byte[] changeAllianceRank(int allianceid, MapleGuildCharacter player) {
            MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

            mplew.writeShort(SendPacketOpcode.ALLIANCE_OPERATION.getValue());
            mplew.write(5);
            mplew.writeInt(allianceid);
            mplew.writeInt(player.getId());
            mplew.writeInt(player.getAllianceRank());

            return mplew.getPacket();
        }