▁in ▁the ▁Eu phr ates ▁valley ▁during ▁the ▁First ▁Pers ian ▁G ulf ▁War . ▁The ▁ 1 7 7 th ▁Arm ored ▁Brigade ▁use ▁a ▁few ▁captured ▁B MP - 1 s ▁in ▁the ▁oppos ing ▁forces ▁( OP FOR ) ▁role ▁during ▁exer cis es ▁at ▁the ▁National ▁Training ▁Center ▁in ▁Fort ▁Ir win , ▁California . ▁ ▁Germany ▁ ▁The ▁East ▁German ▁National ▁People ' s ▁Army ▁operated ▁one ▁of ▁the ▁greatest ▁ar sen als ▁of ▁Soviet - built ▁B MP - 1 s ▁among ▁the ▁arm ies ▁of ▁the ▁Wars aw ▁P act . ▁On ▁▁ 3 ▁October ▁ 1 9 9 0 , ▁when ▁German ▁reun ification ▁took ▁place , ▁ 1 , 1 1 2 ▁functional ▁B MP - 1 s ▁became ▁the ▁property ▁of ▁the ▁Federal ▁Republic ▁of ▁Germany ' s ▁Bundes wehr . ▁The ▁original ▁plan ▁was ▁to ▁retain ▁them , ▁until ▁the ▁German - built ▁M ard er ▁ 2 ▁or ▁the ▁modern ized ▁M ard er ▁ 1 ▁ ▁became ▁available ▁in ▁ade qu ate ▁numbers . ▁They ▁were ▁brought ▁up ▁to ▁NAT O ▁safety ▁standards , ▁modern ized ▁( f itted ▁with ▁a ▁new ▁radio , ▁rear - view ▁mirror s ▁and ▁reflect ors ) ▁and ▁received ▁the ▁design ation ▁B MP - 1 A 1 ▁Ost ▁( See ▁the ▁' G erm any ' ▁section ▁in ▁the ▁B MP - 1 ▁variants ▁article ▁for ▁details ). ▁The ▁majority ▁of ▁vehicles ▁brought ▁up ▁to ▁B MP - 1 A 1 ▁Ost ▁standard