▁soon ▁forced ▁him ▁to ▁change ▁the ▁starting ▁date ▁several ▁times ▁until ▁it ▁was ▁determined ▁that ▁the ▁British ▁main ▁attack ▁should ▁commence ▁on ▁ 2 4 ▁of ▁April ▁and ▁the ▁rest ▁on ▁ 3 0 ▁of ▁April . ▁In ▁accord ance ▁the ▁British ▁began ▁the ▁ 2 nd ▁Battle ▁of ▁Do ir an ▁according ▁to ▁schedule ▁but ▁were ▁soon ▁forced ▁to ▁call ▁off ▁their ▁attacks ▁as ▁it ▁became ▁clear ▁that ▁the ▁rest ▁of ▁the ▁Al lies ▁were ▁not ▁able ▁to ▁deliver ▁their ▁attacks ▁on ▁time . ▁The ▁dates ▁for ▁the ▁attacks ▁were ▁finally ▁set ▁for ▁the ▁ 5 ▁of ▁May ▁in ▁the ▁Cr na ▁B end ▁and ▁ 8 ▁of ▁May ▁in ▁the ▁Ser bian ▁and ▁British ▁se ctors . ▁ ▁In ▁the ▁Cr na ▁B end ▁sector ▁the ▁planned ▁attack ▁was ▁assigned ▁to ▁the ▁left ▁right ▁of ▁the ▁French ▁Army ▁of ▁the ▁East ▁– ▁the ▁so - called ▁First ▁Group ▁of ▁Div isions ( under ▁the ▁command ▁of ▁General ▁Georges ▁Leb ouc ) ▁and ▁to ▁the ▁Italian ▁Ex ped ition ary ▁Force . ▁Its ▁primary ▁task ▁was ▁to ▁pen et rate ▁all ▁Bulgar ian ▁and ▁German ▁lines ▁in ▁the ▁direction ▁of ▁the ▁town ▁of ▁Pri le p ▁and ▁thus ▁threaten ▁the ▁rear ▁of ▁the ▁Bulgar ian ▁forces ▁around ▁the ▁V ard ar ▁and ▁Mon ast ir . ▁General ▁Sar ra il ▁had ▁survey ed ▁the ▁area ▁and ▁determined ▁that ▁the ▁It ali ans ▁and ▁French ▁should ▁deliver ▁a ▁front al ▁assault ▁against ▁almost ▁the ▁entire ▁length ▁of ▁the ▁def ensive ▁line ▁which ▁caused