▁had ▁the ▁B MP - 1 ▁in ▁all ▁three ▁motor ▁rif le ▁reg iments ▁while ▁the ▁Roman ians ▁and ▁Bulg ari ans ▁had ▁no ▁B MP - series ▁vehicles . ▁ ▁Poland ▁ ▁Poland ▁bought ▁ 1 , 4 0 9 ▁B WP - 1 s ▁( B WP - 1 ▁is ▁the ▁Polish ▁design ation ▁for ▁two ▁Soviet ▁B MP - 1 ▁models ▁– ▁Ob ' ye kt ▁ 7 6 5 Sp 2 ▁and ▁Ob ' ye kt ▁ 7 6 5 Sp 3 ), ▁from ▁the ▁Soviet ▁Union ▁in ▁ 1 9 6 9 . ▁The ▁first ▁B WP - 1 s ▁began ▁to ▁arrive ▁in ▁Poland ▁in ▁ 1 9 7 2 ▁and ▁continued ▁until ▁ 1 9 7 9 . ▁The ▁first ▁vehicles ▁entered ▁service ▁with ▁the ▁Lud owe ▁Woj sko ▁Pol skie ▁in ▁ 1 9 7 3 . ▁It ▁still ▁plays ▁the ▁role ▁of ▁a ▁basic ▁inf antry ▁fighting ▁vehicle . ▁B WP ▁is ▁an ▁ac ron ym ▁for ▁the ▁Polish ▁name ▁for ▁an ▁IF V ▁and ▁stands ▁for ▁Bo j owy ▁W ó z ▁P iech oty ▁( which ▁literally ▁transl ates ▁as ▁Fight ing ▁Ve h icle ▁of ▁Infantry ). ▁As ▁such ▁it ▁is ▁used ▁by ▁many ▁units ▁of ▁the ▁Polish ▁Army , ▁including ▁the ▁ 4 th ▁arm ored ▁caval ry ▁brig ade ▁( SB K P anc ) ▁from ▁Or z ysz ▁and ▁the ▁ 7 th ▁Coast al ▁Def ense ▁Brigade ▁from ▁S łu ps k . ▁B WP - 1