public static byte[] updateAllianceLeader(int allianceid, int newLeader, int oldLeader) {
            MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

            mplew.writeShort(SendPacketOpcode.ALLIANCE_OPERATION.getValue());
            mplew.write(25);
            mplew.writeInt(allianceid);
            mplew.writeInt(oldLeader);
            mplew.writeInt(newLeader);

            return mplew.getPacket();
        }