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The supporters of FK Sloga are known as "Vojvode" ("The Dukes") and the group was formed in the early 1980s. The core hooligan group used to be 50-100 strong in the late 1980s and early 1990s. The reorganization of many smaller groups into a single coherent organisation took place in 1990. Vojvode are known as "Vojvode 1990" and they have several hundred members organized into various subgroups throughout the city, and the most important ones are named Young Dukes, East Family, Central Ghetto, Vikinzi (The Vikings), Teror Pijeskovi, Lamela Corps and Urban Boys From Park (U.B.F.P).