The last time Manchester United didnt qualify was in the 1995-96 season. They played in the UEFA Cup that year.
Manchester United won the Carling Cup in 2010. However, the Carling Cup has never been considered a "major" trophy. Even if it were, the answer would be wrong, as Manchester United won the Premier League in 2011.
As of November 2011, the last time Manchester United and Arsenal faced each other in the FA Cup, on March 12, 2011, Manchester United won 2 - 0, with goals from FÃ¡bio and Wayne Rooney.
In the 2009 European Cup when Barca won 2-0.
Chelsea won the last f.A. cup.
The last time Manchester United beat Arsenal by a score of 1 - 2 was on April 14, 1999 in the FA Cup.
Manchester United have only 1 Treble, winning the Premier League, FA Cup and European Cup, and have done this in 1999.
2005. Arsenal beat Manchester United on penalties after a goalless game.
Southampton beat Manchester United 1-0 in the FA cup at Wembley stadium in 1976. The Referee awarded the goal even though it was offside. This was the first and last time Southampton won the FA cup. Manchester United manager Tommy Docherty said he would be back the next year to win the cup with Manchester United. He was and they did.
The last time Arsenal won a trophy was in 2005. They won FA cup by beating Manchester United 5-4 on penalty shootout.
The FA Cup in 2005, where Arsenal won on penalties against Manchester United in the final, after a 0-0 draw in normal and extra time.