September 18, 1931 CE / East Asia
The September 18 Incident and Japan's Occupation of Northeast China
Japan's Kwantung Army used a railway explosion as a pretext to attack Shenyang, then expanded its occupation of Northeast China, marking an important beginning of Chinese resistance to Japan and the escalation of war in East Asia.
The story
On September 18, 1931, Japan's Kwantung Army staged a railway explosion and used it as a pretext to attack Shenyang, subsequently occupying large areas of Northeast China. In 1932, Japan established the puppet state of Manchukuo and retained effective control. Local people and armed forces continued to resist. Investigations and condemnation by the League of Nations failed to stop the aggression, and Japan withdrew from the League in 1933. Localized resistance began in 1931, while full-scale resistance broke out in 1937; these two starting points reflect different scopes of observation. The map marks the area around Liutiaohu in Shenyang.
Elsewhere in the world
The crisis in Northeast China exposed the limitations of the collective security mechanisms established after the First World War and, together with later wars of expansion in Europe, changed the international order.
Dates and precision
September 18, 1931 CE Documented date
Positioned by the documented year, month or day; missing months and days are not inferred.
Representative map location
Shenyang · Liutiaohu
The point represents the Liutiaohu area in Shenyang, where the incident began, rather than the full extent of the occupation of northeastern China.
Representative coordinates · 41.835°, 123.465°
Coordinates locate a representative point for the story. They do not mean the event happened only here and do not represent historical borders.
Bibliography
- Ministry of Foreign Affairs of China | Historical Record for September 18
- Ministry of Foreign Affairs of the PRC | This Day in Diplomatic History: December 10
- United States Holocaust Memorial Museum | World War II in the Pacific
Sources are listed as bibliography titles, without external links. A reference does not mean every sentence or interpretation has been independently verified.