Deadwood is the story of the early days of Deadwood, South Dakota; woven around actual historic events with most of the main characters based on real people. Deadwood starts as a gold mining camp and gradually turns from a lawless wild-west community into an organized wild-west civilized town. The story focuses on the real-life characters Seth Bullock and Al Swearengen. 
 
http://www.imdb.com/title/tt0348914/