The organized supporters of Partizan are called "Grobari" ("The Gravediggers" or "Undertakers"), which were formed in 1970 and situated mainly on the south stand of the Partizan Stadium; therefore, they are also known as "Grobari Jug" ("The Undertakers South"). Even some ordinary Partizan fans often refer to themselves as "Grobari". The nickname itself was given by their sporting rivals Delije of Red Star, referring to the club's mostly black colours which were similar to the official uniforms of cemetery undertakers. The other theory is that the name comes from a misinterpretation of the name of the street on which Partizan's stadium is located – ""Humska"" (""humka"" roughly translates as "grave" or "entombment"), when actually the street was named after Serbian medieval land of Hum, nowadays part of Herzegovina and South Dalmatia. The "Grobari" support all clubs in the Partizan Sports Association and in the course of time they have become recognizable by their noisy and constant cheering as well as their devotion and loyalty to the club. The basis of their cheering is referred in the Serbian fan scene as the principle of ""srce, ruke, glas"" (heart, hands, voice) or ""glas i dlan"" (voice and palms), along with songs in distinctive style. The "Grobari" as a whole maintain a close friendship with the organized supporters of PAOK, CSKA Moscow and CSKA Sofia, which started originally because of the two supporters' common Orthodox faith and similar founding backgrounds. It has been suggested that "many ultras took part in the armed conflicts and carry their scars today, translating the tribal nature of the Yugoslav wars to their clubs and ultras groups".