Bespin is a planet that is featured in Star Wars Battlefront.
Star Wars Battlefront: Bespin (the DLC that Bespin is featured in) was released on June 21, 2016 for Season Pass holders and July 5, 2016 for players who wish to purchase the DLC as an individual content pack.
Bespin is a gas giant planet that is not suitable for human life. But there is an area in the planet's atmosphere that is known as the Life Zone where there are large amounts of oxygen. It is in this area that the floating facility of Cloud City resides over Bespin.
Cloud City has several repulsorlift engines and tractor beam generators that keep it afloat. The entire city is basically a massive resort and vacation spot that also contains facilities to keep it running.
Cloud City is ran by Baron Administrator Lando Calrissian. He had to abandon his post as head of the facility because he became a member of the Rebel Alliance, which was not taken kindly to by the Galactic Empire.