Delije (Serbian: Делије), roughly translated to English as Hardmen, is an umbrella name referring to the supporters of various sports clubs that compete under Red Star Belgrade Sports Society banner.
Though the Red Star Sports Society has clubs in over twenty sports, Delije mostly focus on football (Red Star Belgrade) and basketball (KK Crvena zvezda). The name Delije first began to be used by hardcore Red Star supporters during late 1980s, with official inauguration taking place on 7 January 1989. Up to that point, the die hard Red Star fans were scattered amongst about eight fan groups that shared the north stand at the Red Star Stadium (known colloquially as Marakana), most prominent of which were Red Devils, Zulu Warriors and Ultras.
Delije organizational structure is fairly decentralized with many subgroups present at the stadium's north stand - the gathering point of the club's most loyal and passionate fans. At any given time, one or two subgroups assert themselves as the most prominent through dedication, regular attendance, willingness to fight, etc. and as a result get to hang their banners on the most visible parts of the stand, their leaders get to lead the chants, etc. Currently, the subgroup Belgrade Boys enjoys the greatest clout while others such as Ultra Boys, Brigate, Heroes, Ultras etc. also wield a lot of influence. In the past, subgroups such as Padina Corps, Fontana, etc. have all left their mark. Since Red Star enjoys a lot of support outside of Belgrade as well, various fan groups exist in cities across Serbia, Montenegro, and Republika Srpska.Those groups are Nislije(Nis,third biggest city in Serbia),Kopre Nedri(Republika Srpska,and the name of tre group was formed after several groups from Republika Srpska joined together,naiming the group that on rough English would sound,across the Drina),and from Montenegro there are several groups named after cities from which they come.
As a sign of appreciation, during the late 1990s, Red Star Football Club painted the word Delije in block letters across their stadium's north stand. Since the mid 1980s Red Star's most devoted fans maintain friendly relations with Olympiacos CFP ultras - a friendship based on common Orthodox faith and same club colours. Since the mid 2000s FC Spartak Moscow fans are also included in this friendship.