National Revolutionary Army The Battle of Baitag Bogd Mountain (Mongolian: Байтаг богдын тулгарал, romanized: Baitag bogdyn tulgaral) or Beitashan Incident (Chinese: 北塔山事件; pinyin: Běitǎshān shìjiàn; Wade–Giles: Pei-ta-shan shih-chien; alternatively Baitak Bogdo incident)[3] was a border conflict between the Republic of China, the Mongolian People's Republic, and the Soviet Union.

[7] At Baitag Bogd, Han Youwen was in command of all Muslim cavalry defending against Soviet and Mongol forces.

[8] Han told American reporter A. Doak Barnett that he believed the border should be about 64 kilometres (40 miles) north of the mountains.

[16] The American ambassador to China branded the Outer Mongolian state as a tool and arm of the Soviet Union.

Sung displayed captured Soviet-style Mongolian military headgear and a Soviet map to the American ambassador.

[24] Chinese Gen. Ma Xizhen and Kazakh Osman Batur fought against the Mongol troops and airplanes throughout June as fierce fighting erupted.