The September 18th Incident (also known as the Fengtian Incident and the Liutiaohu Incident) was a war of aggression against China deliberately created and launched by Japan in the northeast of China, and it was the beginning of Japanese imperialist aggression against China.

1931September 18, the Japanese kwantung army stationed in the northeast of China suddenly attacked Shenyang and occupied the northeast by force. /kloc-from the end of 0/9 to the first half of the 20th century, Japan gradually decided to conquer China and Manchuria before conquering China.

1930, the world capitalist economic crisis spread to Japan. In order to transfer the increasingly fierce domestic class contradictions, the Japanese accelerated the pace of military aggression against China, and in July and August of 193 1, the Wanbaoshan Incident and the Nakamura Incident were created in the northeast of China.

/kloc-In September of 0/8, the Japanese created the "Wicker Lake Incident" and launched a war of aggression against northeast China.