Encyclopaedia Britannica's editors oversee issue regions in which they have got in depth know-how, no matter whether from many years of practical experience acquired by engaged on that material or by way of analyze for a complicated degree. They create new written content and confirm and edit articles acquired from contributors. Dudo recorded th

The 1st raid in 820 CE was unsuccessful as the Vikings experienced no notion of who or what they might face at the time they landed. They were being hence conveniently defeated via the shore guard and, struggling losses, retreated. Every time they returned in 841 CE, underneath the command of Asgeir, they ended up significantly better well prepared