18 Sep 31: Japan invades Manchuria, induced by the Mukden incident. This invasion marks the true beginning of World War II. China asks the League of Nations to intervene, but no military action is taken. More: http://scanningwwii.com/a?d=0918&s=310918 #WWII
1931: On September 19 Manchuria was invaded by the Kwantung Army of the Empire of Japan immediately following the Mukden Incident, a staged event engineered by Japanese military personnel as a pretext for invasion. The Japanese establish a puppet state, called Manchukuo, and their occupation lasts until the end of World War II. Japanese troops enter Mukden.