debundesliga1-5, Exercise 2: Trouble elsewhere, policy at home Model answer: Clubs and fans travelled across Europe, so violence abroad involved German teams or could happen at their matches. A disaster such as Heysel showed what could go wrong and led European bodies to set rules that German clubs had to follow in European competition. It also raised public concern, so German authorities and clubs reviewed their own security, policing and fan work. Football is international, so events in one country shape rules in all. Details should be checked.