The Nanjing Massacre, also known as the Rape of Nanjing, Nanking Massacre or Rape of Nanking, was stated mass killings, rapes, and looting of Chinese citizens and capitulated soldiers by soldiers of the Japanese army in association with its seizure of Nanjing (Nanking), China, on 13 December 1937, during the Second Sino-Japanese War.
The estimated numbers killed have varied widely. Wikipedia states estimates from 40,000 to over 300,000. Views on events, causes, and responsibilities are disputed and politically very sensitive, especially in China and Japan. Less politically correct views include that some of the claims may have been fabricated for propaganda reasons.