Roughly the area of the Bronze Age Collapse: https://en.wikipedia.org/wiki/Late_Bronze_Age_collapse#/medi...

Roughly the area of the Dark Ages: https://en.wikipedia.org/wiki/Migration_Period#/media/File:I...

If anything, the area of the Dark Ages looks to be larger than that of the Bronze Age Collapse. But either way, they're both referring to events that happened within a specific geographic area.