ŠK Krajišnik Banja Luka (Serbian Cyrillic: ШК Крајишник Бања Лука) was afootball club based inBanja Luka,Vrbas Banovina,Kingdom of Yugoslavia.
The club was formed in 1919 and, although football was already being played before, it is the first club registered in Banja Luka. Along withFK Sloboda Novi Grad, also from the region ofBosanska Krajina, back then roughly corresponding to the Vrbas Banovina Yugoslav subdivision, it was among the founders of the Zagreb football sub-association.[1] Backed by some of the wealthiest people from the town, Krajišnik became the dominant and most popular club in Banja Luka, and the interwar period was marked by a rivalry and local derby with ĐSK Balkan, withBorac being the outsider, or third contender. Krajišnik initially existed asGrađanski sportski klub Krajišnik, and included a tennis section as well. After initially being part of the Zagreb football subassociation, soon after, Vrbas Banovina region was separated and Banja Luka football subassociation was formed.
Krajišnik dominated the competition within the sub-association, and after numerous failed attempts, it reached to qualify to the1935–36 Yugoslav Football Championship. After passing the round of sixteen because ofHajduk Split withdrew from the tournament, they lost againstSK Ljubljana in the quarter-finals (1–3;1–4).[2]
Popularity of football was increasing, so in 1937, mostly funded by the donations of Bogoljub Kujundžić, the ban of the Vrbas Banovina, a new stadium was inaugurated, theBanja Luka City Stadium, which was initially named after him until the start of the Second World War.[3] At its inauguration on September 5, 1937, Krajišnik played against Yugoslav championsBSK Belgrade.[3] Earlier, the first night football game under electric illumination was played in 1933 between Krajišnik andFK Mačva Šabac.[1]
At the start ofSecond World War, Krajišnik disappeared as the region fells under control of theNazi Germany-backedIndependent State of Croatia. At the end of the war in 1945 the new authorities supported thelabour movement-backedFK Borac and gave them the property that belonged to Krajišnik which was not revived ever after.[4]
At the1935–36 Yugoslav Championship, Krajišnik was coached by Milorad Zakić, and the players were: Milorad Zakić (coach/goalkeeper), Ranko Kasalović, Vojislav Davidović, Dimitrije Marić, Mehmed Jakić, Vojislav Samardžija, Božidar Kačavenda, Petar Cvetković, Zvonimir Kurtović, Arsen Ljubibratić, Aleksandar Mastela, Ivica Bilić and Vladislav Beljanski.[5]