the serbs of bijeljina celebrate Social_event 1 april as `` city defense Defending day '' , and a street in the city has been named Name_conferral after the sdg .

the christmas uprising Change_of_leadership or christmas rebellion Change_of_leadership ( serbian : unk unk , `` unk unk '' or unk unk , `` unk unk '' ) refers to an uprising Change_of_leadership led by the unk , in response Response to the podgorica assembly Come_together 's claim Statement of authority to unite Cause_to_amalgamate the kingdom of montenegro with the kingdom of serbs , croats , and slovenes .

according to the treaty of saint-germain-en-laye , signed on Sign_agreement 10 september 1919 , maribor and the rest of lower styria became Becoming part of the kingdom of serbs , croats and slovenes .

although the outcome Coming_to_believe of the battle Hostile_encounter against the serbs was a tactical victory for the croatians , it became Becoming a serious political liability for the croatian government and international political pressure Convincing forced Causation a withdrawal Escaping to the previous ceasefire lines .