2 ▁and ▁construction ▁was ▁completed ▁in ▁August ▁ 1 9 0 5 ▁with ▁the ▁Rus so - Ch inese ▁Bank ▁as ▁its ▁first ▁ten ant . ▁Later ▁the ▁administration ▁of ▁Mong ol or ▁head ed ▁by ▁Baron ▁Victor ▁von ▁G rot ▁moved ▁into ▁the ▁building ▁around ▁ 1 9 1 0 . ▁ ▁The ▁Mong ol or ▁Building ▁was ▁where ▁the ▁Chinese ▁soldiers ▁of ▁X u ▁Sh uz h eng ▁made ▁a ▁last ▁stand ▁against ▁the ▁C oss ack ▁army ▁of ▁Roman ▁von ▁Ung ern ▁Stern berg ▁in ▁early ▁ 1 9 2 1 . ▁Baron ▁Ung ern ▁made ▁the ▁building ▁his ▁headquarters . ▁He ▁used ▁the ▁west ▁wing ▁as ▁his ▁office , ▁the ▁east ▁wing ▁as ▁a ▁place ▁of ▁inter rog ation ▁and ▁the ▁bas ement ▁as ▁a ▁prison . ▁ ▁After ▁the ▁People ' s ▁Revolution ▁in ▁mid - 1 9 2 1 ▁the ▁School ▁of ▁the ▁Red ▁P ants ▁was ▁established ▁with ▁nine ▁chosen ▁students ▁perman ently ▁station ed ▁in ▁the ▁building . ▁This ▁institution ▁later ▁became ▁the ▁Military ▁Academy . ▁▁ ▁The ▁aut ops y ▁of ▁Su kh ba atar ▁was ▁carried ▁out ▁inside ▁the ▁building ▁on ▁Feb ▁ 2 3 , ▁ 1 9 2 3 . ▁ ▁In ▁ 1 9 3 5 ▁the ▁contents ▁of ▁the ▁ 1 9 2 1 ▁military ▁hospital ▁on ▁American ▁Hill ▁was ▁cart ed ▁east ▁to ▁its ▁new ▁location ▁in ▁the ▁Mong ol or ▁Building . ▁The ▁hospital ▁was ▁named ▁" Mil it ary ▁Hospital ▁of ▁the ▁Red ▁Revolution ary ▁Sold