Student Rags were manifestations of the rivalry between the two institutions and first became popular in the late nineteenth century. Student rags often featured cross-dressing and processions that mirrored official celebrations as a way of challenging authority whilst raising money for charity. Rags were "colourful, subversive, and occasionally dangerous" for both participants and bystanders and reached their height between the two World Wars. A long-running campaign of the rags were the attempts to capture each other's mascots. Running battles were supposedly brought to an end by the colleges' authorities in the first half of the twentieth century, but rivalry amongst the University of London's colleges continues to this day.