The 1966 general election was the third constitutionally mandated election held in the Republic of England, conducted on May 1st, 1966. The election featured the first true two-party election in the country's history - the governing coalition of various factions under Prime Minister Charles Morgan was challenged, and defeated, by a strong, focused Labour Party led by Donald Sutcliffe that took a small majority of seats in Parliament and thereby ousted the Morgan regime that had governed effectively unchallenged since the provisional Parliament was formed in 1957.