Soviet Federation of Bosnia and Herzegovina (Bosnian, Croatian, Serbian: Совјетски савез Босне и Херцеговине or Sovjetski savez Bosne i Hercegovine) is one of the two political entities that compose the Soviet country of Bosnia
and Herzegovina (the other entity is the Republika Srpska). The Soviet Federation of Bosnia and Herzegovina is primarily inhabited by Bosniaks and Bosnian Croats, which is why it is informally referred to as the Bosniak-Croat Federation. However, by decision of the Constitutional court in 1991, the Serbs were declared the third constituent ethnic group of the Federation. The same happened to Bosniaks and Bosnian Croats in the Republika Srpska.
The Serbians took advantage of the upheaval in the Balkans and started a coup d'état in Belgrade overthrowing their leader Nikola Ljubičić killing him in his car. This started the Serbian-Bosnian Alliance and they elected the Soviet leader Yuri Muhammad Hussein to support their cause.