Following World War II, a competing professional football league was organized known as the All America Football Conference which began to play in the 1946 season. In its second year the franchise assigned to the Miami Seahawks was relocated to Maryland's major commercial and manufacturing city of Baltimore. After a fan contest the team was renamed the Baltimore Colts and used the team colors of silver and green. The Colts played for the next three seasons in the old AAFC. until they agreed to merge with the old National Football League (of 1920–1922 to 1950) when the NFL was reorganized. The Baltimore Colts were one of the three former AAFC powerhouse teams (known by the designation "AAFC" or "1947–50") to merge with the NFL at that time, the others being the San Francisco 49ers and the Cleveland Browns. This new Colts team, now in the "big league" of professional American football for the first time, although with shaky financing and ownership, played only in the 1950 season of the reorganized "third" NFL, and was later disbanded and moved.