The document summarizes the Japanese invasion and occupation of Nanjing, China in 1937. It describes how Nanjing became the capital of China, its population swell due to refugees fleeing the Japanese invasion, and the Japanese army's advance and capture of the city on December 13th. It then discusses the subsequent Nanking Massacre where the Japanese committed widespread atrocities against Chinese soldiers and civilians, with estimates of 300,000 killed and 20,000 women raped over the following six weeks.