The International Stargate Command (abbreviated to ISGC) serves as Earth's base of operations for off-world surveillance and reconnaissance through the stargate, operated by the United States government. Largely supplied and outfitted by the US Air Force, and later the United Nations, the facility is well-equipped to handle a wide variety of alien and domestic threats. The outpost was original located in the lower levels of Cheyenne Mountain, but after the mountain was destroyed during the Der'kal conquest of Earth, it was rebuilt at the southernmost tip of Manhattan island, in the specially-built O'Neill Stargate Terminal.