Republic of Serbian Krajina

The Republic of Serbian Krajina or Serb Republic of Krajina (Serbian: Република Српска Крајина / Republika Srpska Krajina, pronounced [rɛpǔblika sr̩̂pskaː krâjina]; abbr. РСК / RSK), also known as the Serbian Krajina (Српска Крајина / Srpska Krajina) or simply Krajina (Крајина), was an unrecognised geopolitical entity and a self-proclaimed Serb quasi-state, a territory within the newly independent Republic of Croatia (formerly part of Socialist Yugoslavia), which it defied, and which was active during the Croatian War of Independence (1991–95).

Source: Wikipedia — Republic of Serbian Krajina (CC BY-SA 4.0)