 In eastern Herzegovina , the KPJ had little impact until mid @-@ August 1941 , well after the initial revolt had been suppressed . During the lead @-@ up to the mass uprising , the KPJ organisation in Herzegovina would not commit itself , as it was waiting for orders from the provincial organisation in Sarajevo , which was expecting direction from the KPJ Central Committee to launch a general uprising across Yugoslavia . Once they became aware of the German attack on the Soviet Union , the KPJ in Herzegovina voted to join the mass uprising , but this only occurred on 24 June , when the uprising was already in full swing . According to <unk> , the rebels remained a threat throughout eastern Herzegovina well into July , although the uprising in Herzegovina did not advance until the Bosnia @-@ wide revolt occurred at the end of July , by which time the KPJ was ready for active involvement in the fighting . 
