To most football fans the origins of the North London derby are quite familiar. Arsenal, having been founded south of the river in Woolwich, moved to Islington and into Tottenham’s North London territory. This is of course the root cause of the animosity. Shortly after the First World War, however, an extraordinary series of events combined to create a catalyst that would continue to be the source of debate amongst the red/white divide for over a century. What is even more intriguing is that it was all started by Liverpool and Manchester United.