The Betazoids were a telepathic humanoid civilization originating from the planet Betazed, and were members of the United Federation of Planets.
According to the novel The Battle of Betazed the Betazoids were finally able to drive the Jem'Hadar away by the application of a highly dangerous, offensive form of empathy. There was also a less risky but far more cruel telepathic way of handling the Jem'Hadar, but the Betazoids rejected this solution, since it would have cost them their peaceful culture. == History and politics ==
Betazed had enjoyed a relatively untroubled history for the last few centuries. This peaceful existence came to a halt in 2374, when the Dominion invaded and occupied the planet. It was probable that the Dominion occupation ceased after the end of the Dominion War. (DS9: "In the Pale Moonlight")