The Migration Period , also known as the Barbarian Invasions , was a
period in European history marked by large-scale migrations that saw the fall
of the Western Roman Empire and subsequent settlement of its former
territories by various tribes, and the establishment of the post-Roman
kingdoms.
The term refers to the important role played by the migration, invasion, and
settlement of various tribes, notably the Franks, Goths, Alemanni, Alans,
Huns, early Slavs, Pannonian Avars, Bulgars and Magyars within or into the
territories of the Roman Empire and Europe as a whole. The period is
traditionally taken to have begun in AD 375 (possibly as early as 300) and
ended in 568.