At least three of my ancestors were Union Army survivors of Andersonville. It seems the odds of getting captured were about 25% and the odds of not surviving capture were about 33%. But if they hadn't survived I don't suppose they'd be my ancestors. My fiance is Armenian, and we're trying to identify her ancestors in old photos prior to 1915. Most Armenian males >18 were killed between 1894 (Hamidian) and 1915 (Armenian Genocide). Genocides are frightfully common in history and frightfully effective in "erasing" a people's collective cultural identities. Most of us take life for granted and can hardly comprehend massive human die-offs, pretty much wall them off in our minds.