1. The Manchurian Incident began in September 1931 when Japanese military officers bombed a railway in Manchuria and blamed Chinese troops to justify invading and taking control of the region from China.
2. An international commission determined that Japan did not act in self-defense, leading Japan to withdraw from the League of Nations in 1933.
3. The incident allowed Japan to establish the puppet state of Manchukuo and marked the beginning of Japanese expansionism in China.