I’ve been reading out the City-burners and the Bronze Age Collapse, when the Mycenaean Palatial civilization fell and the Greek Dark ages began. It is a fascinating topic, and we know so little about it. It was certainly skipped over when I was in school! But over the course of one generation, an entire way of life in a dozen nations changed completely, and almost all the major cities of those nations were burned to the ground. And no one really knows who did it, or why.
You can start reading about it
here
But be warned, looking into this will lead you an a wild tour through wikipedia.