After just a couple of played matches the club changed its name into FK Sremac Zemun.

On 20 October 1946, the two clubs were merged to form a new sports society whose football section was FK Jedinstvo Zemun.

It stayed at Second national level for two seasons, after which it returned into the Serbian republic league, Yugoslav third tier.

The club won three matches after penalties, defeated two first league sides and goalie Nemanja Jovšić was voted most valuable player.

During the summer, however, Zemun was not able to obtain a license from UEFA and had to give their spot to fourth-placed side Borac Čačak.

The following year after a bad start, they fired Dragoljub Bekvalac and hired Milan Milanović.

[6] In November 2017, a news website Srbijadanas.rs, published a research in which they found that FK Zemun is the club that transferred more players, 35 at that time, than any other club to the Serbian "Big two" eternal rivals, Partizan and Red Star Belgrade.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

[11] Nowadays the group is composed of several sub-groups, and beside supporting their club FK Zemun, they are usually present at the matches of the Serbia national team.