Before the war crimes of Unit 731, there were events led to the
Second Sino-Japanese War. Those major incidents are the
Invasion of Manchuria, January 28 Incident, Marco
Polo Bridge Incident, and Rape of Nanjing.
Second Sino-Japanese War. Those major incidents are the
Invasion of Manchuria, January 28 Incident, Marco
Polo Bridge Incident, and Rape of Nanjing.