Coridan
Coridan is a Class M Federation planet in the Coridan system, homeworld of the Coridans. In 2151, it had a population of over 3 billion. It is rich in valuable resources, most significantly dilithium.
In the 2150s, Coridan was known for its extensive shipyards and its advanced warp-capable vessels. However, the planet was also embroiled in a conflict between rebel forces, supported by the Andorians, and the government, backed by the Vulcans. The Vulcan agenda was to keep the planet's chancellorship stable, which in turn assured its dilithium exports to Vulcan. (ENT: "Shadows of P'Jem")
Coridan was one of the planets in the initial Coalition of Planets, preceding that of the United Federation of Planets. (ENT: "Demons")
Over the next century, Coridan would become under-populated to the point that it could not defend its dilithium mines.
In 2267, Coridan sought admission to the United Federation of Planets. However, due to the wealth of minerals available on Coridan and the presence of illegal mining operations, Coridan's admission was a controversial subject between Tellarites and Vulcans. The Babel Conference was convened to settle the matter and ultimately approved Coridan's admission. Ambassador Sarek of Vulcan was credited with achieving the consensus towards admitting the planet to the Federation. (TOS: "Journey to Babel"; TNG: "Sarek")
During the Dominion War, Coridan's dilithium mines came under attack by the Dominion in 2374 due to their strategic importance. Gelnon left Kudak'Etan in command of the USS Defiant while he and his ship left to launch an attack on Coridan. (DS9: "In the Cards", "One Little Ship")
