Repeating myself here.
AlsoBut to be honest, I wouldn't at all be surprised if a culture like that of the Vikings did give some form of military role their women. It's fairly logical that when most of the fighting age men, leave for long seasons of campaigning and trading, the women left behind would have to step up as the heads of households and possibly even defend their communities to some extent. These incidents could have contributed to fueling the Shieldmaiden mythology.
The few historical references we do have to fighting Viking women, come from the Byzantines. During the Siege of Dorostolon, when the Varangians were besieged in a city, the Varangian women took active part in the defense.
It is debatable if women took active roles in campaigning tho. This mostly due to the rather severe lack of historical references by outside sources to the presence of female warriors among the Viking. Victims of Viking raiders wrote fairly extensively about their habits, appearances, practices etc. They are actually the primary sources about Vikings beyond archaeological evidence.
From http://www.hurstwic.org/history/arti...t_happened.htmowever, most of these people would not have called themselves Vikings. In the old Norse language, the word víkingr means pirate or raider, and few of these Northern people participated in raiding. Raiding was a part time occupation, practiced by a small percentage of the population. Few Vikings were professional soldiers, although like all men in this era, they were familiar with the use of weapons. These people were farmers first and needed to take care of the farm chores most of the year. They were entrepreneurs: business men who saw raiding as a means of acquiring capital that could be invested in a ship, in a farm, or in a business. Others may have been on the lookout for land on which they could settle. Raiding was thought to be desirable for a young man, but a more mature man was expected to settle down on the farm and raise a family.