Solais V was the inhabited fifth planet of the Solais system. It was the homeworld for the Solari, a humanoid species. In 2365, after fifteen centuries of warfare, the two warring Solari factions were on the brink of mutual extinction. That year Riva was called in to mediate peace negotiations on the planet when he was attacked and his chorus was killed at the site of the historic Battle of Zambrano, located on the northern hemisphere of the planet. Despite the great loss, Riva remained on Solais V to continue the negotiations. (TNG: "Loud As A Whisper" )