WWII was characterized by the many civilian and military casualties. The specific tragedies we have studied include: the Soviet Prisoners of War, the Katyn Forest Massacre, the Allied Bombings of Dresden, the Allied Prisoners in Asia, the Canadian Defence of Hong Kong, the Atomic Bombings of Hiroshima & Nagasaki, and of course, the Holocaust.
What lessons have been learned from these tragedies? You can look at the tragedies in general or at a specific one. Do you believe society still remembers these lessons?