There is a quite a bit of information on the web that deals with the "Rape of Nanking," the genocide that occurred in 1937 when the Japanese army occupied the Chinese city of Nanking.  These are some of the sites that I want you to look at so that you can submit the required paragraph assignment. (I can add other sites to this list at your suggestion):

• Nanking Massacre (wikipedia)
  
• The Nanking Atrocities (very explicit photos)
• Genocide in the 20th Century The Rape of Nanking, 1937-1938
• Gendercide Watch Case Study: The Nanjing Massacre 1937-38
  
• Japanese War Crimes  Nanjing Massacre Record (Note that some of these links do not work any longer)
• Nanjing 1937:  The Memorial Hall of the Victims in Nanjng Massacre by Japanese Invaders
  
• 1937 Nanking Massacre.  While there are a lot of pictures on the site and a short overview, there is no clear indication of who wrote or published the site.
  
• The Nanjing Massacre:  An English translation of a classified Chinese document on the Nanjing Massacre
• One final victim of the Rape of Nanking? [Iris Chang]
• Memorial Hall of the Victims in the Nanjing Massacre (has numerous links and a readers' bulletin board)
• David Askew, The Nanjing Incident: Recent Research and Trends (a scholarly paper that exams the Massacre in light of contemporary Sino-Japanese developments)
• Jennifer Butt, Rape of Nanking
• A short primary document in the Modern History Sourcebook: The Nanking Massacre, 1937
• There is a short interview with Iris Chang as part of the Penguin website that promotes her book.
• More information about Chang, Ami Chen Mills, Breaking the Silence