c. 1,200 B.C.
The Bronze Age(c. 3,300 B.C.) The Bronze Age begins in Mesopotamia, Egypt, and the Indus Valley. The Bronze Age begins in Europe 100 years later (c. 3,200 B.C.), an... more Collapse, an approximately 300 year period, was a violent, sudden, and culturally disruptive period in which many civilizations collapsed, a large number of cities were entirely destroyed and abandoned, trade was disrupted, and literacy plummeted.