Battle of Wuyuan

Battle of Wuyuan
	Part of Second Sino-Japanese War
	; Chinese 35th Army
Date	March 16 – April 3, 1940; (2 weeks and 4 days)
Location	Vicinity of Wuyuan in Western Suiyuan
Result	Chinese victory
Belligerents
Republic of China	Empire of Japan
Commanders and leaders
Fu Zuoyi; Ma Hongbin; Ma Hongkui; Ma Buqing	Naozaburo Okabe; Shigenori Kuroda
Strength
28,000 including Chinese Muslim Cavalry	5,000 - 10,000

The Battle of Wuyuan (March 16 – April 3, 1940; Chinese: 五原戰役) was a Chinese counterattack that defeated the Japanese invasion of the Wuyuan area. This happened in reaction to the Chinese 1939-40 Winter Offensive in Suiyuan during the Second Sino-Japanese War. The Japanese call it 第２次後套作戦 ("The Second Battle of Wuyuan").

By 28 January 1940 the Japanese had built up forces from the 26th Division at Baotou sufficient to launch the 第１次後套作戦 or "First battle of Wuyuan in Inner Mongolia" to recover lost territory and move west to take Wuyuan which fell on February 3 and Linhe further west on 4 February.