What is united arsenal?

As an AI language model, I can tell you that there is no such thing as "United Arsenal". However, I can provide you with information about the English Premier League clubs Manchester United and Arsenal, which are two separate teams.

Manchester United Football Club, commonly known as Man United or simply United, is one of the most successful football clubs in the world. The club was founded in 1878 and is based in Manchester, England. United has won 20 league titles, 12 FA Cups, and three European Cups, among numerous other honours. The team's home stadium is Old Trafford, which has a capacity of 74,140.

Arsenal Football Club, on the other hand, is a London-based football club that was founded in 1886. The team has a rich history and has won 13 league titles, 14 FA Cups, and two European Cups. Arsenal's home stadium is the Emirates Stadium, which has a seating capacity of 60,704.

Both Manchester United and Arsenal are considered to be two of the biggest football clubs in England and have a passionate fan base. They have also had a fierce rivalry over the years, with their matches often being referred to as one of the most anticipated fixtures of the season.