On 17 August 1919 a large popular assembly was held outside the church in Beltinci following Sunday Mass. The army of the Kingdom of Serbs, Croats and Slovenes, which five days earlier had occupied Prekmurje with the blessing of the Paris Peace Conference, handed over the government of the region to Srečko Lajnšic, appointing him temporary civil commissioner. The temporary administration formally ended on 4 June 1920 with the signing and subsequent ratification of the Treaty of Trianon, which defined the borders of the new Kingdom of Hungary.