7 ▁of ▁May ▁the ▁Al lies ▁renew ed ▁their ▁bomb ard ment ▁once ▁again . ▁On ▁this ▁day ▁the ▁bar rage ▁was ▁even ▁more ▁powerful ▁than ▁the ▁previous ▁days ▁and ▁the ▁Italian ▁and ▁French ▁guns ▁fired ▁more ▁than ▁ 1 5 , 0 0 0 ▁shell s ▁on ▁the ▁lines ▁of ▁the ▁Bulgar ian ▁ 2 / 2 nd ▁Infantry ▁Brigade ▁alone . ▁Str ong er ▁reconna issance ▁pat rol s ▁were ▁dispatch ed ▁but ▁were ▁once ▁again ▁held ▁of ▁by ▁the ▁Bulg ari ans ▁and ▁Germ ans , ▁who ▁answered ▁with ▁sending ▁their ▁own ▁pat rol s ▁to ▁determine ▁weather ▁the ▁Al lies ▁were ▁prepar ing ▁for ▁a ▁major ▁inf antry ▁attack . ▁The ▁results ▁of ▁the ▁three - day ▁art illery ▁bar rage ▁proved ▁uns atisf actory ▁and ▁General ▁Gros set ti ▁decided ▁that ▁it ▁should ▁be ▁continued ▁on ▁the ▁ 8 ▁of ▁May ▁with ▁the ▁help ▁of ▁four ▁observation ▁bal lo ons . ▁The ▁day ▁for ▁the ▁main ▁inf antry ▁attack ▁was ▁finally ▁set ▁for ▁the ▁ 9 ▁of ▁May . ▁ ▁Over all ▁the ▁results ▁of ▁the ▁four - day ▁pre lim inary ▁art illery ▁bomb ard ment ▁proved ▁uns atisf actory . ▁The ▁Al lied ▁fire ▁did ▁not ▁cause ▁severe ▁damage ▁to ▁the ▁Bulgar ian ▁and ▁German ▁def ensive ▁line ▁while ▁the ▁greater ▁focus ▁of ▁the ▁art illery ▁fire ▁on ▁some ▁points ▁of ▁the ▁line ▁gave ▁a ▁clear ▁indic ation ▁of ▁the ▁directions ▁where ▁the ▁main ▁attack ▁was ▁to ▁be ▁delivered . ▁The ▁def enders ▁also ▁used ▁every