Solkar served as the first Vulcan ambassador to Earth, though prior to the establishment of a United Earth government. (ENT episode: "The Catwalk") From the formal formation of United Earth in 2130 to 2155, the Vulcan Ambassador to United Earth was Soval. During this period, the Vulcan Ambassador was considered by some to be the "power behind the throne" on Earth, since the word of Vulcan carried great sway with the leaders of the United Earth government. (ENT episodes: "Broken Bow", "The Forge") In 2269, the Vulcan Ambassador to Earth was a male Vulcan named Sytok. (TOS novel: Prime Directive)