[1] During the match, fans usually create a competitive atmosphere with big flags, paper rolls, scarfs and loud chanting.
On the other side, FK Željezničar Sarajevo is a club which was formed by a group of railway workers much earlier, in 1921.
However, until then, during the pre-war period, they were in the shadow of Đerzelez, SAŠK and Slavija and had never managed to qualify to the Yugoslav Championship.
Željezničar won the second-tier Bosnian championship title in 1946, as part of the Yugoslav football league system, and that achievement marked the beginning of their climb.
FK Sarajevo supporters were considered to be upper-class individuals, mainly from Bosniak dominated old and central parts of town.
Both clubs have supporters from all classes and from all ethnic groups, even if FK Sarajevo fan base is still very predominately Bosniak.
FK Željezničar's most passionate fans (wearing blue) are called Manijaci because their love for the club is on the edge of insanity, so it is said.
[4][5] In home games at Asim Ferhatović Hase Stadium, they are located on the North stands, while the older fans are known as the Pitari (similar to the Košpicari etymology except referring to pie and not seeds) and they are mainly on the East side.
When the game is played on Koševo, The Maniacs are on the South and South-West side, Horde zla on the North and the East.