This unit draws upon and adapts resources from the book The Nanjing Atrocities: Crimes of War and its related media collection. This unit consists of five lessons designed to lead high school students through an examination of the war crimes perpetrated by Japanese troops in the Chinese city of Nanjing during World War II. Focusing on the historical context for the atrocities committed in Nanjing, the unit also incorporates elements of the Facing History and Ourselves scope and sequence. Students bear witness to the event through the voices of Nanjing survivors, reflect on the consequences of human action and inaction during times of crisis, and consider how to achieve justice and reconciliation in the aftermath of atrocities. Above all, the five lessons in this unit stress an appreciation of the dangers of unchecked nationalism and militarism. By examining what happens when a nation fosters a climate of superiority, intolerance, and dehumanization, students will gain a deeper understanding of the Nanjing atrocities and the events of World War II in East Asia.