 At dawn on 29 June , the rebels attacked the Ustaše in a village on the Mostar – Nevesinje road . Prohaska demanded help from Mostar , and planned to send a force from Nevesinje to assist . From Mostar , a company of the 21st Battalion was despatched to relieve the Ustaše , who had managed to hold off the rebels . The Home Guard company then took over the post from the Ustaše . The same day , two new battalions arrived in Mostar , the 23rd Battalion from Osijek and the 15th Battalion from Travnik . These reinforcements arrived just as Prpić received confirmation that Avtovac had been captured by the rebels . The remaining small garrison in Gacko , consisting of only 20 gendarmes and 30 Ustaše , were holding out but expecting more attacks by the rebels . In the morning , the attack by elements of the 10th Battalion stalled until the battalion commander , Lieutenant Colonel Julije Reš , personally took command of the operation , clearing the way for the Italians . The promised Italian intervention commenced about midday , and about 100 trucks of Italian soldiers arrived in Gacko about 17 : 00 . As they had passed through Avtovac , the rebels had left the town and withdrawn to villages to the east . About 18 : 00 , the 10th Battalion relieved the besieged gendarmes in the village schoolhouse . ZNDH aircraft from Mostar airfield flew reconnaissance sorties over the area and dropped leaflets over Stolac , Stepen , Avtovac , Gacko and Plužine . 
 At dawn on 29 June , the rebels attacked the Ustaše in a village on the Mostar – Nevesinje road . Prohaska demanded help from Mostar , and planned to send a force from Nevesinje to assist . From Mostar , a company of the 21st Battalion was despatched to relieve the Ustaše , <a href='null_relcl' title='1'><mark>who</mark></a><a href='been_done' title='2'><mark>had</mark></a> managed to hold off the rebels . The Home Guard company then took over the post from the Ustaše . The same day , two new battalions<a href='been_done' title='3'><mark></mark></a> arrived in Mostar , the 23rd Battalion from Osijek and the 15th Battalion from Travnik . These reinforcements arrived just as Prpić received confirmation that Avtovac <a href='been_done' title='4'><mark>had</mark></a> been captured by the rebels . The remaining small garrison in Gacko , consisting of only 20 gendarmes and 30 Ustaše , <a href='uninflect' title='5'><mark>were</mark></a> holding out but expecting more attacks by the rebels . In the morning , the attack by elements of the 10th Battalion stalled until the battalion commander , Lieutenant Colonel Julije Reš , personally took command of the operation , clearing the way for the Italians . The promised Italian intervention commenced about midday , and about 100 trucks of Italian soldiers<a href='been_done' title='6'><mark></mark></a> arrived in Gacko about 17 : 00 . As they <a href='been_done' title='7'><mark>had</mark></a> passed through Avtovac , the rebels <a href='been_done' title='8'><mark>had</mark></a> left the town and withdrawn to villages to the east . About 18 : 00 , the 10th Battalion<a href='been_done' title='9'><mark></mark></a> relieved the besieged gendarmes in the village schoolhouse . ZNDH aircraft from Mostar airfield flew reconnaissance sorties over the area and dropped leaflets over Stolac , Stepen , Avtovac , Gacko and Plužine . 
At dawn on 29 June , the rebels attacked the Ustaše in a village on the Mostar – Nevesinje road . Prohaska demanded help from Mostar , and planned to send a force from Nevesinje to assist . From Mostar , a company of the 21st Battalion was despatched to relieve the Ustaše , done managed to hold off the rebels . The Home Guard company then took over the post from the Ustaše . The same day , 2 new battalions done arrived in Mostar , the 23rd Battalion from Osijek and the 15th Battalion from Travnik . These reinforcements arrived just as Prpić received confirmation that Avtovac done been captured by the rebels . The remaining small garrison in Gacko , consisting of only 20 gendarmes and 30 Ustaše , was holding out but expecting more attacks by the rebels . In da mornin , tdaattack by elements of the 10th Battalion stalled til the battalion commander , Lieutenant Colonel Julije Reš , personally took command of the operation , clearing thdaay for the Italians . The promised Italian intervention commenced bou midday , and about 100 trucks of Italian soldiers done arrived in Gacko abbout7 : 00 . As they done passed through Avtovac , the rebels done left thedawn and withdrawn to villages to the dat . Abobou : 00 , the 1da Battalion done relieved the bedaged gendarmes in the vildae schoolhouse . ZNDH aircraft from Mostar airfield flew reconnaissance sorties over the areadad dropped leaflets ova Stolac , Stepen , Avtovac , Gacko and Plužine .