 On 23 and 24 June , spontaneous mass gatherings occurred at several villages in the Gacko and Nevesinje districts . These rallies were prompted by the news of the German invasion of the Soviet Union , and those attending them voted to fight against the Ustaše . Professor Marko Attila Hoare states that the full @-@ scale uprising resulted from the Ustaše retaliation against attempts of the Serbs of eastern Herzegovina to defend themselves , combined with the launching of the German invasion on 22 June . At dawn on 24 June , the area of Nevesinje descended into full @-@ scale revolt , with around 400 armed rebels engaging the Home Guard garrison . By 24 June , the uprising had reached a massive scale across eastern Herzegovina , with between 1 @,@ 500 and 3 @,@ 000 armed rebels in total , including some Montenegrins . 
 On 23 and 24 June , spontaneous mass gatherings occurred at several villages in the Gacko and Nevesinje districts . These rallies <a href='uninflect' title='1'><mark>were</mark></a> prompted by the news of the German invasion of the Soviet Union , and those attending them voted to fight against the Ustaše . Professor Marko Attila Hoare <a href='uninflect' title='2'><mark>states</mark></a> that the full @-@ scale uprising resulted from the Ustaše retaliation against attempts of the Serbs of eastern Herzegovina to defend themselves , combined with the launching of the German invasion on 22 June . At dawn on 24 June , the area of Nevesinje descended into full @-@ scale revolt , with around 400 armed rebels engaging the Home Guard garrison . By 24 June , the uprising <a href='been_done' title='3'><mark>had</mark></a> reached a massive scale across eastern Herzegovina , with between 1 @,@ 500 and 3 @,@ 000 armed rebels in total , including some Montenegrins . 
On 23 and 24 June , spontaneous mass gatherings occurred at several villages in the Gacko and Nevesinje districts . dese rallies was prompted by the news of da German invasion of tdaSoviet Union , and those attending em voted to fight against the Ustaše . Professor Marko Attila Hoare state dat thdaull @-@ scale uprising resulted from the Ustaše retaliation against attempts of the Serbs of eastern Herzegovina to defend theyself , combined with the launching of thedarman invasion on 22 June . At dawn on 24 June , the area of Nevesinje descended into full @-@ scale revolt , wid around 400 armed rebels engaging the Home Guard garrison . By 24 June , the uprising done reached a massive scale across eastern Herzegovina , with between 1 @,@ 500 and 3 @,@ 000 armed rebels in total , including some Montenegrins .