public static byte[] getAllianceInfo(MapleGuildAlliance alliance) {
            MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

            mplew.writeShort(SendPacketOpcode.ALLIANCE_OPERATION.getValue());
            mplew.write(12);
            mplew.write(alliance == null ? 0 : 1);
            if (alliance != null) {
                addAllianceInfo(mplew, alliance);
            }

            return mplew.getPacket();
        }