The Greek Dark Age

The linear B script that the Mycenaean civilization had developed stopped being used with any regularity, and it eventually disappeared altogether. With the loss of writing in Greece, we also lost record of history, such that it existed. So that's why we call the following three centuries the Dark Age. It's as if someone turned out the lights because written records tended to disappear during this period. During the Greek Dark Age, Greece experienced an extended period of migrations and resettlements.