Archaeological evidence provides some indication of the disparate cultures of southern Europe and their histories between 2000 and 1000 B.C. On the Greek mainland and islands, complex societies, in which craft specialization develops, emerge, flourish, and collapse, and the use of bronze for weapons and tools gives way to the introduction of iron. On the Italian peninsula, Italic tribes enter from the north, bringing with them the knowledge of bronze. Across the Italian and Iberian peninsulas there are significant migrations, changes in settlement patterns, and an influx of eastern Mediterranean goods.