The Vulcan Defense Force is the military arm of the Confederacy of Vulcan which are charged with the protection of Vulcan and its colonies. The Vulcan Ministry of Defense are in charge with the administration of this branch of the Vulcan state. The Minister of Defense is known to work closely with Starfleet in order to maintain peak efficiency as well as to ensure coordination between the two. (Last Unicorn RPG module: The Way of Kolinahr: The Vulcans) After the founding of the United Federation of Planets in 2161, the Defense Force presumably became a branch of Federation Starfleet.