▁ 8 0   mm ▁of ▁arm our ▁at ▁ 5 0 0 ▁meters , ▁and ▁could ▁thus ▁defeat ▁t anks ▁such ▁as ▁the ▁US ▁built ▁M 3 ▁Grant ▁and ▁M 4 ▁Sh erman ▁used ▁by ▁the ▁British ▁Army . ▁As ▁such , ▁these ▁machines ▁were ▁responsible ▁for ▁many ▁of ▁the ▁success es ▁by ▁the ▁Italian ▁arm oured ▁troops ▁during ▁ 1 9 4 2 – 4 3 , ▁when ▁the ▁medium ▁t anks ▁( all ▁armed ▁with ▁a ▁ 4 7 ▁mm ▁gun ) ▁were ▁no ▁longer ▁effective . ▁On ▁another ▁account , ▁the ▁Sem ov ente ▁da ▁ 7 5 / 1 8 ▁on ▁M 1 4 ▁ch asis ▁allowed ▁the ▁Ari ete ▁and ▁the ▁L itt orio ▁division ▁a ▁somewhat ▁wider ▁tact ical ▁re per toire ▁until ▁British ▁deployment ▁of ▁U . S . ▁medium ▁t anks ▁neg ated ▁that ▁small ▁advantage . ▁ ▁The ▁most ▁successful ▁action ▁fought ▁by ▁Sem ov ente ▁da ▁ 7 5 / 1 8 ▁took ▁place ▁on ▁ 1 0 ▁June ▁ 1 9 4 2 , ▁south ▁of ▁Kn ights bridge , ▁during ▁the ▁Battle ▁of ▁Gaz ala . ▁Th irty ▁M 3 ▁Grant ▁and ▁ten ▁M 3 ▁Stuart ▁of ▁ 1 st ▁and ▁ 6 th ▁Royal ▁T ank ▁Regiment ▁attacked ▁a ▁position ▁held ▁by ▁the ▁Ari ete ▁division ▁but ▁were ▁rep elled ▁by ▁Sem ov ente ▁da ▁ 7 5 / 1 8 s ▁as ▁well ▁as ▁some ▁M 1 3 / 4 0 s ▁and ▁gun ▁tr uck s ,