 On 20 May , the recently formed Home Guard battalions began to deploy into the Adriatic Command area . On 27 May , 6 officers and 300 gendarmes of the Sarajevo @-@ based 4th <unk> Regiment were deployed into parts of eastern Herzegovina . They established platoon strength posts in Nevesinje , Trebinje , Gacko and Bileća , with their headquarters also in Bileća . The Dubrovnik @-@ based 2nd <unk> Regiment established posts in Stolac and Berkovići . The headquarters of Adriatic Command was transferred to Mostar in late May , and General Ivan Prpić was appointed as its commander . 
