The Busby years (1945-1969)

Matt Busby was appointed manager in 1945 and took a then-unheard of approach to his job, joining the players for training as well as performing administrative tasks. He was immediately successful, with the club finishing second in the league in 1947 and winning the FA Cup in 1948.

He adopted a policy of bringing in players from the youth team whenever possible, and the team won the league in 1956 with an average age of only 22. This youth policy has now become instrumental in the club's success. The following season, they won the league again and reached the FA Cup final, losing to Aston Villa. They also became the first English team to compete in the European Cup, and reached the semi-final.

Tragedy struck the following season, when the plane carrying the team home from a European Cup match crashed on take-off at a refuelling stop in Munich, Germany. The Munich air disaster of 6 February 1958 claimed the lives of eight players and another fifteen passengers. There were rumors of the club folding and withdrawing from competitions, but with Jimmy Murphy taking over as manager while Busby recovered from his injuries, the club continued playing with a makeshift side. Despite the accident, they reached the FA Cup final again, where they lost to Bolton. At the end of the season, UEFA offered the FA the opportunity to submit both United and the eventual champions, Wolverhampton, for the 1958-59 European Cup as a tribute to the victims, but the FA declined.

Busby rebuilt the team throughout the early 1960s, signing players such as Denis Law and Pat Crerand. The team won the FA Cup in 1963, then won the league in 1965 and 1967 and the European Cup in 1968, being the first English club to do so. This team was notable for containing three European Footballers of the Year: Bobby Charlton, Denis Law and George Best. Busby resigned as manager in 1969 and was replaced by the reserve-team coach and former United player, Wilf McGuinness.