The Nanjing Massacre led to the increased tension between the United States and Japan in the year 1937.
The Nanjing Massacre constituted and event of mass murder and mass rap* committed by Japanese troops against the residents of Nanjing, which was the capital of the Republic of China, during the Second Sino-Japanese War.
The massacre spanned for six weeks starting on December 13, 1937, the day that the Japanese captured Nanjing.