Mars 2 is a small ring style space station in orbit of Mars. Finished in 2092 it was a private-public partnership between the US government and a large group of corporations interested in the economic potential of a large base opening up new frontiers outside of the Earth-Moon sphere. The station is 500m in diameter and resembles a thin ring with a central hub connected by spokes. The outer ring contains living and work space for up to 500 people but it never reached half that number. The central hub contains a large dock, environmental systems, hydroponic farms, the main reactor, and various industrial facilities. The station was designed to be self-sufficient for basic supplies and be able to process small asteroids into fuel and raw materials.
Mars 2 operated for a decade before it became clear Mars was simply too far away and resources near Earth still too plentiful for such a remote location to have any economic potential. The population of the station dwindled over the years down to a small skeleton crew of scientists and staff to maintain the station but was finally officially mothballed and abandoned in 2107.