▁possible ▁moment ▁to ▁repair ▁the ▁damage ▁to ▁their ▁fort ifications ▁under ▁the ▁cover ▁of ▁their ▁own ▁art illery . ▁The ▁Bulgar ian ▁and ▁German ▁art illery ▁and ▁its ▁observations ▁posts ▁were ▁pract ically ▁un touch ed ▁by ▁the ▁Al lied ▁bomb ard ment . ▁While ▁the ▁Bulgar ian ▁inf antry ▁units ▁suffered ▁ 9 4 5 ▁cas ual ties ▁during ▁the ▁four ▁day ▁of ▁bomb ard ment , ▁the ▁ ▁losses ▁of ▁the ▁art illery ▁were ▁only ▁ 1 0 ▁men ▁killed ▁or ▁wounded ▁and ▁several ▁guns ▁dam aged ▁or ▁destroyed . ▁ ▁Infantry ▁assault ▁ ▁The ▁beginning ▁of ▁the ▁inf antry ▁attack ▁was ▁set ▁by ▁the ▁Al lied ▁command ▁for ▁ 6 : 3 0 ▁on ▁ 9 ▁of ▁May ▁and ▁as ▁the ▁inf antry ▁prepared ▁the ▁art illery ▁res umed ▁its ▁bar rage ▁with ▁much ▁greater ▁vig or , ▁once ▁again ▁eng ulf ing ▁the ▁entire ▁def ensive ▁line ▁in ▁a ▁cloud ▁of ▁smoke ▁and ▁dust . ▁At ▁precisely ▁ 6 : 3 0 ▁the ▁Italian , ▁French ▁and ▁Russian ▁inf antry ▁moved ▁out ▁of ▁their ▁tren ches ▁and ▁advanced ▁against ▁the ▁Bulgar ian ▁and ▁German ▁positions ▁along ▁an ▁ 1 1 - kil ometer ▁long ▁line . ▁ ▁The ▁assault ▁of ▁the ▁ 3 5 th ▁Division ▁ ▁The ▁ 3 5 th ▁Italian ▁Infantry ▁Division ▁attacked ▁the ▁Bulgar ian ▁ 2 / 2 ▁Infantry ▁Brigade ▁and ▁German ▁ 2 0 1 st ▁Infantry ▁Brigade ▁with ▁its ▁Sic ilia ▁and ▁I v rea ▁inf antry ▁brig ades ( 6 1