The Brighton & Hove Albion–Crystal Palace rivalry, sometimes nicknamed the A23 derby or the M23 derby by the media, but not by the fans, is the rivalry between English football teams Brighton & Hove Albion and Crystal Palace. Both clubs joined the Football League in 1920, and in the 95 seasons since, they have played in the same division on 49 occasions. Crystal Palace have played in a higher division 40 times, and Brighton 6 times. In unofficial matches during the Second World War, the two sides met 18 times with Palace winning 13, Brighton 3 and 2 draws.