This DBQ has six documents about The Rape of Nanking, The Holocaust and The Rwandan Genocide. The prompt says, "Analyze the justifications and effects of genocide during the twentieth-century." The documents show that a common justification is the dehumanization and the effects are large numbers of a groups of people are killed. Some documents are more reliable than others and students are supposed to discuss the documents reliability in their essay.
There is also a DBQ outline paper that comes with the DBQ to help work students through the essay.