The rivalry between Leeds United and Manchester United, sometimes nicknamed the Roses rivalry,[1] is a footballing rivalry played between the Northern English clubs Leeds United and Manchester United. The rivalry originates from the strong enmity between the historic counties of Lancashire and Yorkshire that resulted from the Wars of the Roses, which took place during the 15th century. Although the cities of Leeds and Manchester lie over 40 miles (64 km) apart, the tradition is upheld and this strong feeling can still be seen between the two clubs. Independent research by the Football Fans Census has shown that, within English football, both Leeds and Manchester United are ranked within the top three clubs based on the number of clubs that consider them to be their rivals. In the past, rivalry between the two clubs has gone beyond the action on the field at Old Trafford and Elland Road.