. A . ▁V . 3 4 ▁He avy ▁T rench ▁Mort ar ▁B atter y , ▁R . F . A . ▁( formed ▁by ▁ 1 6 ▁August ▁ 1 9 1 6 ; ▁left ▁for ▁VI ▁Corps ▁ 6 ▁March ▁ 1 9 1 8 ) ▁X . 3 4 , ▁Y . 3 4 ▁and ▁Z . 3 4 ▁Med ium ▁Mort ar ▁B atter ies , ▁R . F . A . ▁( formed ▁by ▁ 1 8 ▁June ▁ 1 9 1 6 ; ▁on ▁ 6 ▁March ▁ 1 9 1 8 , ▁Z ▁broken ▁up ▁and ▁distributed ▁among ▁X ▁and ▁Y ▁batter ies ) ▁ ▁Royal ▁Engine ers ▁ 1 0 5 th ▁Field ▁Company ▁( left ▁February ▁ 1 9 1 5 ) ▁ 1 0 6 th ▁Field ▁Company ▁( left ▁February ▁ 1 9 1 5 ) ▁ 2 0 7 th ▁( N or folk ) ▁Field ▁Company ▁( jo ined ▁February ▁ 1 9 1 5 ) ▁ 2 0 8 th ▁( N or folk ) ▁Field ▁Company ▁( jo ined ▁February ▁ 1 9 1 5 ) ▁ 2 0 9 th ▁( N or folk ) ▁Field ▁Company ▁( jo ined ▁February ▁ 1 9 1 5 ) ▁ 3 4 th ▁Div is ional ▁Sign als ▁Company ▁ ▁Royal ▁Army ▁Medical ▁Corps ▁ 1 0 2 nd ▁Field ▁Am bul ance ▁ 1 0 3 rd ▁Field ▁Am bul ance ▁ 1 0 4 th ▁Field