eastern Herzegovina during the night, and Prpić travelled from Sarajevo to Mostar to take control of operations, to find that information about the situation in eastern Herzegovina was unclear, but suggested that NDH forces could be facing serious difficulties. 26 June On the morning of 26 June, the company of the 6th Battalion that had been sent from Mostar continued towards Nevesinje, but almost immediately came under fire from a rebel group. With the assistance of Ustaše, the Home Guard were able to hold their ground, but they were unable to break through to Nevesinje. That afternoon, two aircraft of the Air Force of the Independent State of Croatia (, ZNDH) from Sarajevo conducted an armed reconnaissance over eastern Herzegovina, and discovered that NDH forces still held Nevesinje. They observed barricades across the Mostar–Nevesinje road, and strafed a group of 50 rebels north of Nevesinje near the village of Kifino Selo. Prpić bolstered the force on the Mostar–Nevesinje road with the 17th Battalion, recently arrived from Sarajevo, and sent his deputy, Colonel Antun Prohaska to command it. The 17th Battalion joined that force at 20:00. About 17:00, the company of the 11th Battalion reached Nevesinje from Kalinovik, and a further company of the battalion was despatched from Sarajevo, along with the battalion commander. In the southern part of the area of operations around Stolac, the situation was significantly calmer than around Nevesinje, although a group of 200 Ustaše at Berkovići were falsely claiming that they were being surrounded by rebels at night. Despite this claim, they had suffered no casualties. Regardless, Prpić sent them ammunition and a platoon of the 18th Battalion. At 19:00 on 26 June, Francetić arrived at Prpić's headquarters in Mostar to be briefed on the situation. He resolved that he would travel to Berkovići the following day and take personal command of the Ustaše unit there. Around Gacko and Avtovac in the north, the day had been quiet. When the commander of the 2nd Company of the 7th Battalion at Gacko reported rebels gathering near the town, Prpić sent a truck-mounted platoon with an ammunition resupply. The platoon was ambushed en route, with 14 Home Guardsmen being captured. Gacko was reinforced later in the day from troops in Avtovac. On the night of 26 June, the Nevesinje garrison was subjected to a sustained attack by the rebels, but held out. The NDH authorities in Trebinje heard