Iron Age Greek migrations

The Iron Age Greek migrations were effected by a population of émigrés from amidst the displacements and reconstruction that occurred in Greece proper from the middle of the 11th century to the end of the 9th century BCE (the Greek Dark Ages). The movements resulted in the settlement of the Aegean islands, Cyprus, Crete and the western coast of Asia Minor and the founding of new cities, which afterwards became centers of the Greek civilization. The migrations by various tribal groups were effected in consecutive waves known as the Aeolic, Ionian, Doric and Achaean (Arcadian) migrations. The movements differed from the Greek colonisation of the Archaic period in that they were more ad hoc affairs, rather than being the result of a planned process of colonisation on the part of the mother city. They are also less well-documented historically and in folk histories are often said to have been led by a mythologized or semi-legendary leader, such as Hercules or Orestes.