After these great years, Radnički Niš relegated in 1984 in the Yugoslav Second League.
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In April 1946 NK Mornar ("Sailor F.C.") based in Split and in 1947 FK Naša Krila ("Our Wings F.C.") based in Zemun were also established, intended to represent the Yugoslav Navy and the Yugoslav Air Force, with both clubs entering the 1947–48 Yugoslav Second League.
They won the Macedonian Republic League on four occasions and along with Vardar, was the only other Macedonian club to have won the Federal EasternYugoslav Second League containing only the teams from 3 federal Republics:Macedonia, Montenegro, Serbia Kosovo and Voivodinship.
In 1960, during the promotional qualifications for the Yugoslav Second League, NK Branik was involved in the food poisoning affair before their match against NK Karlovac.
However, faced with little playing chances, he moved to FK Leotar Trebinje where he became a prolific goalscorer in the Yugoslav Second League.