Ro yal ▁F us ili ers ) ▁– ▁am alg am ated ▁into ▁ 2 / 2 nd ▁B n ▁ 1 2 ▁September ▁ 1 9 1 8 ▁▁ 2 / 2 4 th ▁( Count y ▁of ▁London ) ▁B n , ▁London ▁Regiment ▁( Que en ' s ) ▁– ▁joined ▁ 1 1 ▁September ▁ 1 9 1 8 ▁▁ 1 7 3 rd ▁T rench ▁Mort ar ▁B atter y ▁– ▁formed ▁before ▁emb ark ation ▁for ▁France ▁▁ 2 1 4 th ▁Company , ▁Machine ▁Gun ▁Corps ▁( M GC ) ▁– ▁formed ▁at ▁Gran th am ▁ 1 0 ▁December ▁ 1 9 1 6 ; ▁joined ▁brig ade ▁ 2 5 ▁March ▁ 1 9 1 7 ; ▁joined ▁No ▁ 5 8 ▁B n ▁M GC ▁ 2 ▁March ▁ 1 9 1 8 ▁ ▁T rench ▁war fare ▁After ▁concentr ating ▁around ▁L uche ux , ▁the ▁brig ade ▁went ▁into ▁the ▁line ▁for ▁the ▁first ▁time , ▁at ▁R ans art , ▁south ▁of ▁Ar ras . ▁This ▁was ▁considered ▁a ▁quiet ▁sector , ▁and ▁the ▁brig ade ▁was ▁attached ▁to ▁ 1 4 6 th ▁( 1 st ▁West ▁R iding ) ▁Brigade ▁of ▁the ▁ 4 9 th ▁( West ▁R iding ) ▁Infantry ▁Division ▁for ▁an ▁introduction ▁to ▁tren ch ▁war fare . ▁From ▁February ▁to ▁April , ▁the ▁ 5 8 th ▁Division ▁followed ▁up ▁the ▁German ▁retre at ▁to ▁the ▁H inden burg ▁Line ▁and ▁was ▁then