How long had Japan and China been at war before the capture of Nanking?
Was there a Chinese resistance movement in the city during the Japanese occupation?
What role did foreigners play in Nanking during Japanese control of the city?
Were the Japanese ever held accountable for their actions in Nanking?
Was there a long history of less-than-good relations between China and Japan?
What role (if any) did Japanese culture play in provoking the genocide?