The Nanjing Massacre was the mass killing of Chinese civilians in Nanjing during the Second Sino-Japanese War. Read about it here.
In the early 20th century, tensions between China and Japan were high. During the Second Sino-Japanese War, Japan had been gaining large areas of China, taking Shanghai in 1937 and Nanjing in 1938. Following their annexation of Nanjing, one of the worst atrocities in history - the Nanjing Massacre, also known as the Rape of Nanjing - took place. Read more about it below.