Vikings in Iberia
Viking activity in the Iberian peninsula seems to have begun around the mid-ninth century as an extension of Viking raids on and establishment of bases in Frankia in the earlier ninth century. While connections between the Norse and Eastern Islamic lands were well-established, particularly involving the Rus') along the Volga and around the Caspian Sea, relations with the Western edge of Islam were more sporadic and haphazard. Although Vikings may have over-wintered in Iberia, no evidence has been found for trading or settlement. Indeed, the Iberian peninsula may not have offered particularly wealthy targets, in the ninth to tenth centuries. Sporadic raiding continued until the end of the Viking Age.
Viking raid warfare and tactics
Vikings, according to Clare Downham in "Viking Kings of Britain in Ireland", are "people of Scandinavian culture who were active outside Scandinavia... Danes, Norwegians, Swedes, Hiberno-Scandinavians, Anglo-Scandinavians, or the inhabitants of any Scandinavian colony who affiliated themselves more strongly with the culture of the coloniser than with that of the indigenous population."