Simplify the following text for a Grade 8 native English-speaking person.
Original: The Migration Period , also called Barbarian Invasions or VÃ lkerwanderung , is a name given by historians to a human migration which happened in the period of roughly AD 300 â `` 700 in Europe .
Simplified: The Migration Period , also called the Barbarian Invasions ( and in ` migration of peoples ' ) , was a period of human migration in Europe that occurred from c. 300 to 700 AD .