The Thirty Years' War[0] lead to the deaths of around one third of the populations of some of the belligerent countries. But that wasn't within living memory fo

The Thirty Years' War[0] lead to the deaths of around one third of the populations of some of the belligerent countries. But that wasn't within living memory for anyone at the time. [0] https://en.wikipedia.org/wiki/Thirty_Years%27_War https://en.wikipedia.org/wiki/Thirty_Years%27_War