It has been the intervention of metal detectorists that has advanced our knowledge of the Viking Great Army that landed in East Anglia in 865AD
Dawn M. Hadley & Julian D. Richards

In AD 865 a Viking Great Army landed in East Anglia, and for the next decade it campaigned throughout England, moving rapidly by river and road. Unlike earlier Viking raids which had been largely hit-and-run affairs, seizing silver and slaves from exposed coastal...