The sprawling complex was originally built as the headquarters of the Earth Starfleet in the early 22nd century, on what was previously a portion of Golden Gate National Recreation Area in Marin County, overlooking Horseshoe Bay. After the founding of the United Federation of Planets in 2161, it continued to serve as the command center of the Federation Starfleet. By 2255, the headquarters had expanded to the Presidio, an ancient military post on the southern side of the Golden Gate, where it included an air tram station. Its address at 24-593 Federation Drive, San Francisco, CA was mentioned in the Treaty of Armens. Starfleet Command, or Spacefleet Command, was the operating authority of Starfleet, the exploratory, scientific, and military department of United Earth before being integrated into the United Federation of Planets in 2161. The organization's primary management center was located at Starfleet Headquarters in San Francisco, Earth.
