Northampton Town achieved a remarkable promotion to the First Division in the 1965-66 season under the guidance of manager Dave Bowen. The club's ascent from the fourth tier to the top flight within five seasons showcased a significant managerial feat. Northampton secured their promotion with a 4-1 victory over Bury, finishing the season in second place, just a point behind champions Newcastle United.
Despite their remarkable promotion, Northampton's top-flight journey was short-lived. The team struggled defensively, conceding 92 goals, the most in the league. Despite winning 10 games and drawing 13, they were ultimately relegated along with Blackburn Rovers. The unique atmosphere of their shared ground with Northamptonshire CCC played a part in their success, with a home record of no losses and only 16 goals conceded in 21 matches. However, the financial challenges of competing in the top flight proved insurmountable for the club at the time.