Originally formed in 1921, the club played in the Tredegar and Ebbw Vale leagues as Fields Park United. In the 1950s the club played in the Abertillery League. This was a period of great success for the club, with six league titles in a 12-year period whilst also reaching 10 cup finals, winning eight of them. In the 1962–63 season the club achieved promotion to the Mon Senior league. In the 1965–66 season, they won the Second Division title to gain promotion to the First Division of the Mon Senior league.
In the 1970–71 season the club were invited to join a new league being set-up by the Gwent Football Association called the Gwent Premier League. The club finished runners-up in the inaugural season, 1971–72 and the next ten years saw a period of great success with three league titles and five runners-up spots. The club joined the Gwent County League (an amalgamation of the Gwent Premier League and Mon Senior League) in the Premier Division and were runners-up in the inaugural season of 1980-81 and 1984–85 and champions in 1981–82. The club applied to the Welsh Football League on numerous occasions without success.
