Your daily reminder that the worst time in (European) history was not under kings and nobility or even priests but under the yoke of the burghers
I dunno, proportionately it was the 30 years war. Some areas of Germany lost 1/3 of their total population from war, disease and famine.
Since it's the quotes thread, there's an appropriate one too:
"As there was no compulsion towards a conflict which, in despite of the apparent bitterness of parties, took so long to engage and needed so much assiduous blowing to fan the flame, so no right was vindicated by its ragged end. The war solved no problem. Its effects, both immediate and indirect, were either negative or disastrous. Morally subversive, economically destructive, socially degrading, confused in its causes, devious in its course, futile in its result, it is the outstanding example in European history of meaningless conflict. The overwhelming majority in Europe, the overwhelming majority in Germany, wanted no war; powerless and voiceless, there was no need even to persuade them that they did. The decision was made without thought of them. Yet of those who, one by one, let themselves be drawn into the conflict, few were irresponsible and nearly all were genuinely anxious for an ultimate and better peace. Almost all—one excepts the King of Sweden—were actuated rather by fear than by lust of conquest or passion of faith. They wanted peace and they fought for thirty years to be sure of it. They did not learn then, and have not since, that war breeds only war."
-Cicely Vivienne Wedgwood