Early Scandinavian Dublin
In the year 795 Vikings (probably of Norwegian origin) raided islands off the coast of Ireland for the first time. This was the beginning of a new phase of Irish history, which saw many native communities – particularly ecclesiastical ones – relocate themselves on the continent, or further afield in places like Iceland and the Faroe Islands, to escape the pagan marauders. For about two decades the invaders confined their activities to coastal settlements; raiding parties were generally small and there is no evidence that any of them wintered in Ireland during this early phase of "hit-and-run" activity. Typically the Vikings would arrive at a settlement without warning, plunder what goods and people they could – the people were usually sold as slaves, though notable personages were often held for ransom – before retreating to their Scandinavian or British bases. This period lasted from 795 until 813, after which there occurred a hiatus of eight years.
It is now thought that these early raids were launched directly from southwest Norway, and that during the period of calm (814–820) the Norwegian Vikings were occupied in northern Britain, laying the foundations of a new kingdom referred to in Irish sources as Laithlind (later Lochlainn). Laithlind was once thought to be in Norway but it is now identified with Viking settlements in the British Isles, especially those in Scotland and the Isle of Man.
Salme ships
According to an early interpretation offered by Jüri Peets, the lead archaeologist at the site, the ships and the dead are of Scandinavian origin. According to the most likely scenario, a war party of Scandinavians attempted to carry out a raid against the Oeselians (Estonian inhabitants of the island of Saaremaa), but were attacked by Oeselian ships. The sides of the two ships contain numerous embedded arrowheads, some of which are of the three-pointed type used to carry burning materials to set enemy ships aflame. After losing too many oarsmen to the Estonian archers, the raiders pulled their ships aground and tried to defend themselves behind them. It appears that after the battle, the Oeselians allowed either the survivors or some other group of Scandinavians to ritually bury their dead. The burial is unusual because the ships were not covered with earth mounds. The site was eventually forgotten by the local inhabitants after it had become overblown by sand and covered with vegetation. The raid-hypothesis has led to a questioning of when the Viking Age began exactly. The Salme event took place 50-100 years earlier than the infamous Lindisfarne Viking raid in England in the summer of AD 793.