The Migration Period, also known as the Barbarian Invasions (from the Roman and Greek perspective), is a term sometimes used for the period in the history of Europe that saw the decline and fall of the Western Roman Empire. The term refers to the important role played by invasions of non-Roman peoples, notably the Franks, Goths, Allemanni, Alans, Huns, early Slavs, and the Pannonian Avars within or into the Roman Empire. The period is traditionally taken to have begun in AD 375 (possibly as early as 300) and ended in 568. Various factors contributed to this phenomenon of migration and invasion, and their role and significance are still widely discussed.
|Invasions of the Roman Empire|
|Time||c. 300–800 or later|
|Place||Europe and the Mediterranean region|
|Event||Tribes invading the declining Roman Empire|
Historians differ as to the dates for the beginning and ending of the Migration Period. The beginning of the period is widely regarded as the invasion of Europe by the Huns from Asia in about 375 and the ending with the conquest of Italy by the Lombards in 568, but a more loosely set period is from as early as 300 to as late as 800. For example, in the fourth century a very large group of Goths was settled as foederati within the Roman Balkans, and the Franks were settled south of the Rhine in Roman Gaul. In 406 a particularly large and unexpected crossing of the Rhine was made by a group of Vandals, Alans and Suebi. As central power broke down in the Western Roman Empire, the military became more important but was itself now dominated by men of barbarian origin.
There are contradictory opinions as to whether the fall of the Western Roman Empire was a result of an increase in migrations, or both the breakdown of central power and the increased importance of non-Romans were the result of internal Roman factors. Migrations, and the use of non-Romans in the military, were known in the periods before and after, and the Eastern Roman Empire adapted and continued to exist until the Fall of Constantinople to the Ottomans in 1453. The fall of the Western Roman empire, although it involved the establishment of competing barbarian kingdoms, was to some extent managed by the eastern emperors.
The migrants comprised war bands or tribes of 10,000 to 20,000 people, but in the course of 100 years they numbered not more than 750,000 in total, compared to an average 40 million population of the Roman Empire at that time. Although immigration was common throughout the time of the Roman Empire, the period in question was, in the 19th century, often defined as running from about the 5th to 8th centuries AD. The first migrations of peoples were made by Germanic tribes such as the Goths (including the Visigoths and the Ostrogoths), the Vandals, the Anglo-Saxons, the Lombards, the Suebi, the Frisii, the Jutes, the Burgundians, the Alemanni, the Sciri and the Franks; they were later pushed westward by the Huns, the Avars, the Slavs and the Bulgars.
Later invasions, such as the Viking, the Norman, the Varangian, the Hungarian, the Moorish, the Turkic and the Mongol, also had significant effects (especially in North Africa, the Iberian Peninsula, Anatolia and Central and Eastern Europe); however, they are usually considered outside the scope of the Migration Period.