The National Football League expanded in 1960 and 1961, adding two teams that would be an incremental part of the NFL in years to come. The Dallas Cowboys came first followed by the Minnesota Vikings who began their first season in September 1961. There were some differences in the expansions as they were applied to the new two teams. These differences are one of the subjects of my ebook. Neither team did very well to begin with but the Vikings surprised several teams, among them a very good Baltimore Colts team. Minnesota wanted a professional football team in part because the owners of the Minnesota Twins wanted additional revenue to retire bonds on Metropolitan Stadium in Bloomington. Metropolitan was situated in Bloomington, which was at the apex of a triangle that also included the cities of St. Paul and Minneapolis. A professional football team was also desired in the Minneapolis area to fill Metropolitan Stadium during the months when the Twins were not active.