ry ▁Brigade ▁and ▁ 4 th ▁Caval ry ▁Brigade . ▁In ▁December ▁ 1 9 4 2 , ▁the ▁ 4 th ▁Caval ry ▁Brigade ▁was ▁sent ▁to ▁the ▁Tw elf th ▁Army ▁and ▁the ▁remainder ▁of ▁the ▁Caval ry ▁Group ▁was ▁converted ▁into ▁the ▁ 3 rd ▁T ank ▁Division . ▁ ▁During ▁most ▁of ▁the ▁Second ▁S ino - J apan ese ▁War ▁and ▁due ▁to ▁the ▁Soviet – J apan ese ▁Ne ut ral ity ▁P act , ▁Inner ▁Mong olia ▁was ▁largely ▁a ▁back water ▁region , ▁and ▁the ▁Mong olia ▁G arrison ▁Army , ▁with ▁its ▁anti qu ated ▁horse ▁caval ry ▁function ed ▁largely ▁to ▁assist ▁and ▁train ▁the ▁M eng ji ang ▁National ▁Army ▁and ▁Mong ol ian ▁Caval ry ▁Corps . ▁It ▁was ▁thus ▁un prep ared ▁for ▁the ▁massive ▁Soviet ▁Red ▁Army ▁arm ored ▁assault ▁at ▁the ▁end ▁of ▁World ▁War ▁II . ▁The ▁Mong olia ▁G arrison ▁Army ▁was ▁officially ▁dis band ed ▁on ▁July ▁ 2 7 , ▁ 1 9 4 6 . ▁Many ▁of ▁its ▁surv iv ors ▁became ▁Japanese ▁prisoners ▁of ▁war ▁in ▁the ▁Soviet ▁Union . ▁ ▁List ▁of ▁command ers ▁ ▁Command ing ▁Officer ▁ ▁Chief ▁of ▁Staff ▁ ▁See ▁also ▁List ▁of ▁Arm ies ▁of ▁the ▁Japanese ▁Army ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : J apan ese ▁arm ies ▁Category : History ▁of ▁Inner ▁Mong olia ▁Category : 1 9 3 0 s ▁in ▁China ▁Category : 1 9 4 0 s ▁in ▁China