▁Zag reb ▁Corps ▁units ▁managed ▁to ▁establish ▁small ▁bridge head s ▁in ▁their ▁designated ▁landing ▁zones ▁in ▁Nov i ▁Grad , ▁Bos anska ▁Kost aj nica ▁and ▁Bos anska ▁Dub ica , ▁but ▁were ▁p inned ▁down ▁by ▁art illery ▁and ▁machine ▁gun ▁fire . ▁As ▁the ▁H V ▁had ▁suffered ▁ 2 7 ▁dead ▁in ▁the ▁first ▁few ▁hours ▁of ▁combat , ▁V r ban ac ▁was ▁sent ▁to ▁inspect ▁the ▁situation ▁and ▁he ▁was ▁app alled ▁by ▁the ▁poor ▁organization ▁of ▁the ▁assault . ▁During ▁the ▁night ▁of ▁ 1 8 / 1 9 ▁September , ▁V RS ▁art illery ▁continued ▁to ▁shell ▁H V ▁positions ▁along ▁the ▁rivers , ▁but ▁also ▁fired ▁on ▁the ▁towns ▁of ▁Nov ska , ▁K ut ina , ▁Nova ▁Gr adi š ka , ▁and ▁D vor . ▁ ▁The ▁AR Bi H ▁drive ▁towards ▁Sans ki ▁Most ▁and ▁Nov i ▁Grad , ▁where ▁one ▁of ▁the ▁bridge head s ▁had ▁been ▁established ▁by ▁the ▁H V , ▁came ▁to ▁a ▁halt ▁on ▁ 1 8 – 1 9 ▁September , ▁as ▁the ▁AR Bi H ▁encountered ▁ 1 4 , 0 0 0 ▁previously ▁und et ected ▁V RS ▁troops ▁in ▁the ▁area , ▁supported ▁by ▁ 2 , 0 0 0 ▁troops ▁that ▁had ▁arrived ▁from ▁Ser bia . ▁▁ 1 9 ▁September ▁Even ▁though ▁V r ban ac ▁ordered ▁a ▁halt ▁to ▁the ▁operation ▁shortly ▁after ▁mid night ▁on ▁ 1 8 / 1 9 ▁September , ▁the ▁B jel ov ar