Boru now believed that Munster was the most powerful kingdom in Ireland and therefore he, and not Máel Sechnaill, should be High-King. Máel Sechnaill's claim to the kingship was challenged by Boru in 1002 at the Hill of Tara. The Meath king requested a month-long truce to rally his subordinates to his side, which Boru accepted, however Máel Sechnaill was quickly abandoned by his northern Uí Néill kinsmen. Having failed to raise enough troops to challenge Boru, he was forced to abdicate, thus ending the hereditary right of the Uí Néill to the title of High King. Although they remained Kings of Meath, the power and prestige of the southern Uí Néill would never recover.