Operation Chahar

Operation Chahar
Part of Second Sino-Japanese War
Date August 1937 Location Vicinity of Beiping and Chahar – Suiyuan Result Japanese and Mongolian Victory
Belligerents
Empire of Japan Mongol Military Government	Republic of China
Commanders and leaders
Kiyoshi Katsuki Shigiyasu Suzuki Seishirō Itagaki Hideki Tōjō De Wang	Tang Enbo Chiang Kai-shek Yan Xishan Fu Zuoyi
Strength
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Casualties and losses
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Operation Chahar (Japanese: チャハル作戦, translit. Chaharu Sakusen), known in Chinese as the Nankou Campaign (Chinese: 南口戰役; pinyin: Nankou Zhanyi), occurred in August 1937, following the Battle of Beiping-Tianjin at the beginning of Second Sino-Japanese War.

This was the second attack by the Kwantung Army and the Inner Mongolian Army of Prince Teh Wang on Inner Mongolia after the failure of the Suiyuan Campaign (1936). The Chahar Expeditionary Force was under the direct command of General Hideki Tōjō, the chief of staff of the Kwantung Army. A second force from the Peiping Railway Garrison Force, later the 1st Army under General Kiyoshi Katsuki, was also involved.

The Chinese forces opposing this invasion of Suiyuan were the Suiyuan Pacification Headquarters under the command of General Yan Xishan. Fu Zuoyi, the governor of Suiyuan, was made commander of the 7th Army Group, and Liu Ju-ming, governor of Chahar, was made its deputy commander, defending Chahar with the 143rd Division and two Brigades. General Tang Enbo was sent by Chiang Kai-shek with the 13th and 17th Corps from the Central Army and made Frontline Commander in Chief. The 1st Cavalry Corps was sent to Chahar under the command of Chiao Cheng-shou, facing the Mongolian forces of Teh Wang.

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