This town was fortified late in the period. There was a probable, but unconfirmed fort at the southwest quadrant of the Watling Street roundabout.
http://roman-britain.co.uk/places/magiovinium.htm
http://www.pastscape.org.uk/hob.aspx?hob_id=344743
http://clutch.open.ac.uk/schools/eaton-fenny00/fennyhist1.html