The implications here is that, from this time onwards, the Hiberno-Scandinavian ruler would hold his kingship from his Munster overlord. Brian, at this stage, aspired to an even tighter dominance of Dublin that than secured by his rival, Máel Sechnaill mac Domnaill, ten years earlier. There seems to be little doubt that the longer term beneficiary of Glenn Máma was Brian alone. With renewed confidence, he again moved against Máel Sechnaill mac Domnaill, even if his initiatives of 1000–1001 resulted in setbacks, one expedition into Brega resulted in his advance cavalry being slaughtered by the Uí Néill, another foray was reversed in Míde (Co Westmeath), and the Dál Cais river-fleet was impeded by the King of Tara and his Connachta allies having constructed a barrier across the Shannon. Brian, however, found a way of circumventing it and, early in 1002, brought a large army through to Athlone and took the hostages of Connacht.