Intergalactic Conference of Andromeda

The Intergalactic Conference of Andromeda was held some time prior to the year 4000. Zephon implied that Mavic Chen, the Guardian of the Solar System, had sponsored it as well as attending the conference.

At the same time, representatives of the Outer Galaxies had conferred with the Daleks and sent along one delegate, Trantis so as to not arouse any suspicions. (TV: The Daleks' Master Plan)