For ten points, name this noted war crime.
Under the command of Lt General Asaka Yasuhiko, the 9th division entered through the Guanghua gate and the 16th through the Zhongshan and Taiping Gates, while two fleets arrived on either side of the Yangtze. After the fall of the city, swollen with refugees fleeing the Japanese advance, in December 13, 1937, the next six weeks saw over 30000 people killed and many women abused. For ten points, name this noted war crime.
Under the command of Lt General Asaka Yasuhiko, the 9th division entered through the Guanghua gate and the 16th through the Zhongshan and Taiping Gates, while two fleets arrived on either side of the Yangtze.
The {Rape of Nanking} or {Nanjing}