A failed attempt by the Trabe in 2372 to kill the leaders of the Kazon sects at a peace conference on Sobras that Captain Janeway had helped to arrange.
The Sobras conference ambush is the climax of the Voyager episode Alliances. Worn down by repeated Kazon attacks, Kathryn Janeway reluctantly decides to seek local allies. Talks with Maje Culluh of the Kazon-Nistrim, who is advised by the former crew member Seska, break down when he asks for crew exchanges and will not deal with a woman as an equal.
Janeway turns to the Trabe, the people who once oppressed the Kazon and were driven from their own world by them. Their leader Mabus appears to want peace, and together they invite every Kazon first maje to a conference on Sobras.
When Mabus looks for an excuse to leave the room, Janeway realises what is planned. A Trabe ship rises outside the windows and opens fire, and Voyager drives it away so that the majes escape. Janeway cuts her ties with the Trabe and leaves with the Kazon more hostile than ever.