On Monday 17 October 2016 Caroline Brett and Paul Gazzoli gave a joint talk at the Department of ASNC, Cambridge, as part of the annual Cambridge University Festival of Ideas. Their subject, chosen to fit in with the festival’s overall theme of ‘movement’, was ‘We the Migrants, They the Invaders?’, an investigation of how some population movements of the early Middle Ages were seen by migrants and their ‘hosts’, and also in modern historiography and popular culture. Caroline discussed the migrations that coincided with the end of the Western Roman Empire in the fifth and sixth centuries, homing in on the creation of Brittany. Paul provided a discussion of the Vikings, under the heading ‘Terrorists or Migrants?’ The talk, chaired by Professor Paul Russell, was very well attended by between 50 and 60 members of the public who enjoyed a lively question and answer session at the end. 34 feedback forms were returned at the end of which five gave us a three-star, fifteen a four-star and fourteen a five-star rating. http://www.festivalofideas.cam.ac.uk/events/we-migrants-they-invaders