The Nanking – or Nanjing – massacre occurred when Japanese troops occupied the city of Nanking in 1937, during the Second Sino-Japanese War. Hundreds of thousands of Chinese civilians and disarmed soldiers were murdered and raped by the Japanese. Read the full story here.
head of a Chinese man, beheaded by Japanese, is wedged in a barricade near Nanking, during the Nanking massacre
Chinese man to be beheaded in Nanking Massacre
A Chinese POW about to be beheaded by a Japanese officer with a shin gunto during the Nanking Massacre
Chinese to be buried alive by Japanese soldiers during Nanking Massacre
The sheer volume of murdered civilians posed a formidable logistical challenge when it came to disposing of the bodies. Many Chinese were conscripted into burial teams
There’s also this particularly gruesome one, but I couldn’t verify its authenticity:
beheading of chinese woman
More iconic images here.