▁ ▁Be ▁an ▁inf antry man ▁satisf actor ily ▁performing ▁inf antry ▁duties ▁ ▁Ass igned ▁to ▁an ▁inf antry ▁unit ▁during ▁such ▁time ▁as ▁the ▁unit ▁is ▁engaged ▁in ▁active ▁ground ▁combat ▁ ▁Act ively ▁particip ate ▁in ▁such ▁ground ▁combat ▁ ▁Camp aign ▁or ▁battle ▁credit ▁alone ▁is ▁not ▁sufficient ▁for ▁award ▁of ▁the ▁C IB . ▁ ▁The ▁specific ▁el ig ibility ▁criteria ▁for ▁the ▁C IB ▁require ▁that ▁an ▁officer ▁( SS I ▁ 1 1 ▁or ▁ 1 8 ) ▁in ▁the ▁grade ▁of ▁colon el ▁or ▁below , ▁or ▁an ▁Army ▁en list ed ▁soldier ▁or ▁war rant ▁officer ▁with ▁an ▁inf antry ▁or ▁Special ▁Forces ▁M OS , ▁who ▁subsequent ▁to ▁ 6 ▁December ▁ 1 9 4 1 ▁has ▁satisf actor ily ▁performed ▁duty ▁while ▁assigned ▁or ▁attached ▁as ▁a ▁member ▁of ▁an ▁inf antry , ▁r anger ▁or ▁special ▁forces ▁unit ▁of ▁brig ade , ▁regiment al , ▁or ▁smaller ▁size ▁during ▁any ▁period ▁such ▁unit ▁was ▁engaged ▁in ▁active ▁ground ▁combat . ▁El ig ibility ▁also ▁includes ▁soldiers ▁or ▁officers ▁with ▁an ▁M OS ▁other ▁than ▁inf antry ▁or ▁Special ▁Forces ▁that ▁hold ▁a ▁prior ▁or ▁secondary ▁inf antry ▁or ▁Special ▁Forces ▁M OS ▁and ▁that ▁are ▁assigned ▁or ▁tempor arily ▁attached ▁to ▁an ▁inf antry ▁unit ▁of ▁any ▁size ▁smaller ▁than ▁a ▁brig ade . ▁El ig ibility ▁for ▁Special ▁Forces ▁personnel ▁in ▁Military ▁Occ up ational ▁Special ties ▁( M OS ) ▁ 1 8 B , ▁ 1 8 C