He eventually went to Taygeta system where he first got involved with the Pleiadian High Command approximately 200,000 years ago. The Pleiadians at the time had just overcome a long period of being enslaved by the Draco Federation.
Ashtar tried to start a mutiny on the ship. He was baited down onto a Draco Federation controlled planet to be tortured and programmed for months.
Overtime he eventually gained control of the Pleiadian High Command by using black magick techniques to dissociate the key members of the deck into making bad decisions. He caused them not to finish many interventions which eventually lead to the Draco Fedration gaining control of this system. One example of this was when he caused the Pleiadian High Command to not finish a key intervention which lead to the destruction of Maldek. He is also mostly responsible for the fall of Atlantis.