Hooliganism refers to unruly and destructive behaviour. Such behaviour is commonly associated with sports fans, particularly supporters of association football and university sports. In some countries, the hooligan elements of a group of supporters are known as Category C. The term can also apply to general rowdy behaviour and vandalism, often under the influence of alcohol or drugs.The word hooliganism and hooligan began to be associated with violence in sports, in particular from the 1960s in the UK with football hooliganism, although one of the earliest known instances of crowd violence at a sporting event involved two chariot racing factions, the Blues and the Greens in the Nika riots which lasted around a week in Constantinople in 532 with nearly half the city being burned or destroyed and tens of thousands of people killed...