http://en.wikipedia.org/wiki/Nanking_%28film%29

Nanking (Chinese: ì) is a 2007 documentary film about the 1937
Nanking Massacre in China.
The films draws on letters and diaries from the era as well as
archive footage and interviews with surviving victims and
perpetrators of the massacre. Contemporary actors play the roles of
the Western missionaries, professors, and businessmen who formed
the Nanking Safety Zone to protect the city's civilians from
Japanese forces. Particular attention is paid to John Rabe, a
German businessman who organized the Nanking Safety Zone, Bob
Wilson, a surgeon who remained in Nanking to care for legions of
victims, and Minnie Vautrin, a missionary educator who rendered aid
to thousands of Nanking's women.