 The NDH authorities only had weak forces in eastern Herzegovina at the time the mass uprising occurred , roughly equal to two Croatian Home Guard battalions , as well as gendarmerie posts in some towns . This was barely adequate to guard important locations , and was insufficient for offensive action . <unk> forces consisted of one company of the 10th Battalion in Trebinje , the headquarters and a reinforced company of the 7th Battalion in Bileća ( the balance of the battalion being divided between Gacko and Avtovac ) , and a company of the 6th Battalion in Nevesinje . The remainder of the 10th Battalion was deploying to Trebinje at the time the rebellion broke out . 
