The Migration Period is a name for a period of invasions and/or migrations into the areas of what had been the (Western) Roman Empire and other invasions/migrations associated with this. What groups to include and the starting and the ending dates are disputed. Various earlier and later migrations are not included.
This period has also been termed in English by the German loanword Völkerwanderung and as the Barbarian Invasions. See also Barbarian.
The views on this period have become influenced by various forms of political correctness, such as race denialism and recent views on "late antiquity". See also the article on Ancient Rome on the causes of the fall of the (Western) Roman Empire.