In 1022, Niall mac Eochaid, the king of Ulaid, inflicted a major defeat on Sigtrygg's Dublin fleet, which was followed up in 1026 with a hosting of the Ulaid into Finn Gall, a Viking settlement just north of Dublin itself.
In 1022, Niall mac Eochaid, the king of Ulaid, inflicted a major defeat on Sigtrygg's Dublin fleet, decimating it and taking its crew captive. In revenge, Niall followed up this victory in 1026 attacking Finn Gall, a Viking settlement just north of Dublin itself.