Mussolini, I saw that in the movie is that also the way the book describes the event?

Skunk works, the first one on that list (the rape of Nanking) was in my opinion the worst attrocity of World War Two in total. If you haven't already you should read the book Rape of Nanking by Iris Chang, only once mind you because of he absolute horrific descriptions in the book. When you read it, you're eyes will be open to the absolute lowest that mankind can sink to.

__________________
Hence the saying: One may know how to conquer without being able to do it- Sun Tzu