The High Council served as the ruling body for the Talz settlement located on the world of Orto Plutonia. It was led by the "Son of Suns," who was the leader named Thi-Sen. Subsequent to a battle on Orto Plutonia, the Galactic Republic sent Jedi Generals Obi-Wan Kenobi and Anakin Skywalker, along with the 501st Legion, and a group from the neighboring satellite of Pantora which included Chairman Chi Cho and Senator Riyo Chuchi, to look into what had happened. After Kenobi and Skywalker discovered the settlement, they arranged a meeting between the High Council and the Pantoran group.
Cho insisted that the Talz were uncivilized and that Pantora owned Orto Plutonia, so he refused to discuss any peaceful resolution. This disagreement led to declarations of war, and a fight quickly broke out between the Talz and the clone cold assault troopers. As the conflict ended, Cho passed away from his injuries, and Chuchi negotiated a peaceful agreement after the Speaker of the Assembly condemned Cho's behavior as inappropriate.