▁Border ers ▁( jo ined ▁June ▁ 1 9 1 8 ) ▁▁ 1 / 8 th ▁Battalion , ▁( T . F .) ▁Camer oni ans ▁( Sc ott ish ▁R if les ) ▁( jo ined ▁June ▁ 1 9 1 8 ) ▁▁ 1 / 5 th ▁( R enf rew shire ) ▁( T . F .) ▁Battalion , ▁Ar gy ll ▁& ▁S uther land ▁High land ers ▁( jo ined ▁June ▁ 1 9 1 8 ) ▁ 1 0 3 rd ▁T rench ▁Mort ar ▁B atter y ▁( re formed ▁ 1 ▁July ▁ 1 9 1 8 ) ▁ ▁On ▁the ▁First ▁day ▁on ▁the ▁Som me , ▁the ▁division ▁had ▁the ▁largest ▁number ▁of ▁cas ual ties ▁of ▁the ▁British ▁divisions , ▁the ▁ 1 0 2 nd ▁Brigade ▁had ▁ ▁and ▁the ▁ 1 0 3 rd ▁Brigade ▁in cur red ▁ ▁From ▁ ▁the ▁brig ades ▁were ▁sw apped ▁with ▁the ▁ 1 1 1 th ▁and ▁ 1 1 2 th ▁brig ades ▁of ▁the ▁ 3 7 th ▁Division , ▁which ▁was ▁holding ▁the ▁line ▁on ▁a ▁quiet ▁sector ▁at ▁V im y ▁R idge . ▁ ▁Div is ional ▁Tro ops ▁ 1 8 th ▁( Service ) ▁Battalion , ▁the ▁North umber land ▁F us ili ers ▁( jo ined ▁as ▁Div is ional ▁P ione er ▁Battalion ▁July ▁ 1 9 1 5 , ▁left ▁June ▁ 1 9 1 8 ) ▁ 2 / 4