Bede made up the Anglo-Saxon invasionWatch
This area is widely debated by historians and archaeologists and there is no real definitive answer to the question of whether there was an 'Anglo-Saxon invasion'. It's clear that there was no united Germanic force that one day showed up and wiped out the British natives but what we can tell is that between the mid 6th and 7th centuries, there were a series of migrations from the areas of Saxony, Jutland etc... While scholars do say that some of these migrations were peaceful, this was not always the case and there is evidence to suggest cases of violent transitions during this period of migration. Overall, whether it can be called a peaceful process or an armed invasion is still up for debate.