In 1930 Soviet Union stopped Buryat migration to the Mongolian People 's Republic to prevent Mongolian reunification . All leaders of Mongolia who did not fulfill Stalin 's demands to perform Red Terror against Mongolians were executed , including Peljidiin Genden and Anandyn Amar . The Stalinist purges in Mongolia , which began in 1937 , killed more than 30,000 people . Choibalsan died suspiciously in the Soviet Union in 1952 . Comintern leader Bohumír Šmeral said , " People of Mongolia are not important , the land is important . Mongolian land is larger than England , France and Germany "
Stalinist purges in Mongolia
Great Purge
Mongolia