Japanese invasion of northeast China

Japanese invasion of Manchuria

Japanese troops marching into Mukden on September 18, 1931

Date	18 September 1931 invasion – 27 February 1932 (5 months, 1 week and 2 days)
Location	Manchuria, Republic of China
Result	Japanese victory Tanggu Truce

Belligerents

Commanders and leaders

Strength

30,000 – 60,450 men

160,000 men

Casualties and losses

The Japanese invasion of Manchuria began on September 18, 1931, when the Kwantung Army of the Empire of Japan invaded Manchuria immediately following the Mukden Incident. The Japanese established a puppet state called Manchukuo, and their occupation lasted until the end of World War II.

The Chinese-Japanese dispute in July 1931 (the Wanpaoshan Incident) was followed by the Mukden Incident, on September 18, 1931. The same day as the Mukden Incident, the Japanese Imperial General Headquarters, which had decided upon a policy of localizing the incident, communicated its decision to the Kwantung Army command. However, Kwantung Army commander-in-chief General Shigeru Honjō instead ordered his forces to proceed to expand operations all along the South Manchurian Railway. Under orders from Lieutenant General Jirō Tamon, troops of the 2nd Division moved up the rail line and captured virtually every city along its 730-mile length in a matter of days, occupying Anshan, Haicheng, Kaiyuan, Tiehling, Fushun, Szeping-chieh, Changchun, Kuanchengtzu, Yingkou, Antung, and Penhsihu.