▁ 1 3 0 - mill imet re ▁guns , ▁ 1 5 5 - mill imet re ▁how itz ers ▁and ▁ ▁ant it ank ▁guns . ▁ ▁Tim eline ▁▁ 1 8 ▁September ▁The ▁cross ings ▁were ▁ham per ed ▁by ▁the ▁high ▁level ▁of ▁the ▁rivers , ▁flo oding ▁of ▁for es hor es , ▁strong ▁curr ents ▁and ▁floating ▁de br is , ▁as ▁well ▁as ▁a ▁short age ▁of ▁boats ▁and ▁other ▁means ▁of ▁river ▁crossing . ▁The ▁equipment ▁provided ▁by ▁the ▁ 3 3 rd ▁Engine er ▁Battalion , ▁including ▁two ▁t ug bo ats ▁and ▁an ▁am ph ib ious ▁vehicle , ▁was ▁late ▁in ▁arriv ing ▁and ▁did ▁not ▁reach ▁the ▁combat ▁zone ▁until ▁no on ▁on ▁ 1 8 ▁September . ▁All ▁along ▁the ▁ ▁course ▁of ▁the ▁Una ▁and ▁S ava ▁rivers ▁where ▁the ▁off ensive ▁was ▁to ▁take ▁place , ▁the ▁H V ▁began ▁art illery ▁bomb ard ment ▁at ▁no on , ▁and ▁cross ings ▁followed ▁after ▁ 1 5 : 0 0 ▁hours . ▁The ▁ 1 2 5 th ▁Home ▁Guard ▁Regiment ▁battle group ▁attempted ▁a ▁crossing ▁near ▁the ▁village ▁of ▁Ko š ut ar ica , ▁but ▁failed ▁after ▁encounter ing ▁strong ▁small ▁arms ▁and ▁mort ar ▁fire . ▁The ▁ 5 2 nd ▁Home ▁Guard ▁Regiment ▁battle group ' s ▁attempt ▁to ▁cross ▁the ▁S ava ▁down stream ▁of ▁Jas en ov ac ▁like wise ▁failed , ▁d eter red ▁by ▁strong ▁mort ar ▁fire . ▁The