The party was founded on September 15, 1920, in order to continue the organized political activity of Croats from Bačka (Bunjevci and Šokci), which had its tradition even before World War I.
After November 28, 1924, a crisis in party came because of disagreements among membership about the visions of organized political life of Croats in Bačka in future.
[3] Finally, Rajić himself turned to leader of Croats Stjepan Radić and became resilient supporter of him and his party, HSS.
On September 19, 1925, BŠS and Pučka kasina have organized in Subotica the celebration and of establishment of Kingdom of Croatia.
Set by Bunjevci Croats" ("Spomen-ploča tisućugodišnjice hrvatskog kraljevstva 925.-1925. godine.