What year did Derby County achieve their biggest win?

Derby County achieved their biggest win in 1946 when they won the FA Cup for the first time in their history. The match took place at Wembley Stadium and was the first time an English team had won the cup since 1939. The match was against Charlton Athletic and ended in a 4-1 win for Derby. The goals were scored by Peter Doherty, Jack Stamps, Reg Harrison and Ronnie Dix. The victory was an historic moment for the team and for the city of Derby and the fans celebrated in an impromptu procession from the stadium to the city centre.

The win was a major achievement for Derby County as they had never won a major trophy before. This win was made even more special by the fact that it was the first time an English team had won the cup since 1939 due to the war. The team was captained by Jack Nicholas, who was the manager of the club at the time. The club had been in the top flight of English football since the late 1920s and had come close to winning the FA Cup on a number of occasions, but this win was the most important.

The win was seen as a symbol of hope and optimism in the city of Derby and the entire country. The team was hailed as heroes and were invited to the Houses of Parliament to be congratulated by the Prime Minister Clement Attlee. The win was also a major boost for the morale of the nation, as it was a sign that the nation was on the road to recovery after the Second World War. This win has since gone down in Derby County's history as their greatest ever achievement.