This part of the Military Frontier included the geographic regions of Lika, Kordun, Banija and bordered the Adriatic Sea to the west, Venetian Republic to the south, Habsburg Croatia to the west, and the Ottoman Empire to the east.
It extended onto the Slavonian Krajina near the confluence of the Una river into Sava. Like the rest of the Military Frontier, it ceased to exist as a political entity in the late 19th century.
Historical context
The Serbs often call this territory "Serbian Krajina" because most of the population used to be Serbian, but Croats call it Croatian Krajina because it is in Croatia.
Cetinska Krajina, the watershed river by Cetina in the Dalmatian hinterland, near the border with Herzegovina (Bosnia and Herzegovina)
CroatianKrajina (on the border of western Croatia and Bosnia)
SAO Kninska Krajina, Kninska Krajina since the Yugoslav wars is used by some to signify two regions Knin and its surroundings, and to a larger extend Krajina proper (referring to main portion of Republic of Serbian Krajina).
The Republic of Serbian Krajina (Republika Srpska Krajina, RSK) was an internationally unrecognized Serbian republic in Croatia.
The original Krajina was carved out of parts of the crown lands of Croatia and Slavonia by Austria in 1553/1578 in order to form a "Military Frontier" with the Ottoman Empire as a means of defending the border.
The net effect of the Krajina's troubled 20th century history was that, by the end of the 1990s, many Krajina Serbs were very distrustful of the Croatian government.