<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2012) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2012) (Learn how and when to remove this template message) </Td> </Tr> <P> This article details the history of the Buffalo Bills . The team began play in 1960 as a charter member of the American Football League (AFL) and won two consecutive AFL titles in 1964 and 1965 . The club joined the National Football League (NFL) as part of the 1970 AFL - NFL merger . The Bills have the distinction of being the only team to advance to four consecutive Super Bowls, but also has the dubious distinction of losing all four of them . </P> <P> The Bills were not the first professional football team to play in Buffalo, nor was it the first NFL team in the region . Professional football had been played in Buffalo and in upstate New York since the beginning of the 20th century . In 1915, Barney Lepper's "Buffalo All - Stars" were founded; the team would later be replaced by the Niagaras in 1918, then the Prospects in 1919 . The Prospects were the basis of what would become the "Buffalo All - Americans," who joined what would become the NFL in 1920 . After changing their name to the Bisons in 1924 (and, for one season, the Rangers in 1926), the team suspended operations in 1927, then came back in 1929 and re-folded at the end of that season . </P>

When did the buffalo bills became a team