Battle of Guanjianao
Part ofHundred Regiments Offensive in theSecond Sino-Japanese War
In October 1940, Peng Dehuai commanded the operation on the front line of Guanjianao (photographed byXu Xiaobing)
Date (1940-10-30) (1940-10-31)October 30–31, 1940 (1 day) Location Guanjianao,Wuxiang County,Shanxi, China Result Japanese victory
Belligerents
Republic of China	Empire of Japan
Commanders and leaders
Peng Dehuai	Kenshu Okazaki[a]
Units involved
8th Route Army	Okazaki Detachment[2]
Strength
20,000 men	500[3]–535 men[2]
Casualties and losses
500+ killed[4] 1,570 wounded[4]	Japanese records: 50 killed[5] 99 wounded[6] Chinese claims: 400+ Japanese killed[1]

TheBattle of Guanjianao was the costliest offensive battle suffered by theEighth Route Army during theSecond Sino-Japanese War, and formed part of the third phase of theHundred Regiments Offensive.

In the later stage of the Eighth Route Army's sabotage operations inNorth China, theImperial Japanese Army counterattacked and advanced to areas close to the Eighth Route Army headquarters.

From 30 October to 31 October 1940, the Eighth Route Army assembled nearly 20,000 troops to besiege approximately 500 Japanese soldiers occupying Guanjianao. However, after two days and nights of fighting, the Japanese force was not completely annihilated.^[7] On 1 November, Japanese reinforcements arrived, forcing the Eighth Route Army to withdraw.^[8]

The Battle of Guanjianao is regarded as one of the most controversial engagements of the Hundred Regiments Offensive, and was considered byPeng Dehuai to be one of the four major defeats of his military career.^[9]

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