▁a ▁pre text ▁for ▁the ▁Bos n ian ▁War . ▁Bos n ian ▁Ser bs ▁began ▁fort ifying ▁the ▁capital , ▁Sar aje vo , ▁and ▁other ▁areas ▁on ▁ 1 ▁March ▁ 1 9 9 2 . ▁On ▁the ▁following ▁day , ▁the ▁first ▁fatal ities ▁of ▁the ▁war ▁were ▁recorded ▁in ▁Sar aje vo ▁and ▁Dob oj . ▁In ▁the ▁final ▁days ▁of ▁March , ▁Bos n ian ▁Ser b ▁forces ▁bomb arded ▁Bos ans ki ▁Bro d ▁with ▁art illery , ▁resulting ▁in ▁a ▁cross - border ▁operation ▁by ▁the ▁Cro at ian ▁Army ▁( H r vat ska ▁voj ska ▁– ▁H V ) ▁ 1 0 8 th ▁Brigade . ▁On ▁ 4 ▁April ▁ 1 9 9 2 , ▁J NA ▁art illery ▁began ▁shell ing ▁Sar aje vo . ▁There ▁were ▁other ▁examples ▁of ▁the ▁J NA ▁directly ▁supported ▁the ▁V RS , ▁such ▁as ▁during ▁the ▁capture ▁of ▁Z v orn ik ▁in ▁early ▁April ▁ 1 9 9 2 , ▁when ▁the ▁J NA ▁provided ▁art illery ▁support ▁from ▁Ser bia , ▁firing ▁across ▁the ▁Dr ina ▁River . ▁At ▁the ▁same ▁time , ▁the ▁J NA ▁attempted ▁to ▁def use ▁the ▁situation ▁and ▁ar range ▁negoti ations ▁elsewhere ▁in ▁the ▁country . ▁ ▁The ▁J NA ▁and ▁the ▁V RS ▁in ▁Bos nia ▁and ▁Herz egov ina ▁faced ▁the ▁Army ▁of ▁the ▁Republic ▁of ▁Bos nia ▁and ▁Herz egov ina ▁( Arm ija ▁Repub like ▁Bos ne ▁i ▁Her ce gov ine ▁–