In 1005, Brian Boru, marched north to accept submissions from the Ulaid, and set-up camp at Emain Macha possibly with the intention of exploiting the symbolism it held for the Ulaid. From here, Boru marched to the Dál nAraidi capital, Ráith Mór, where he received only the submissions of their king and that of the Dál Fiatach. This however appears to have been the catalyst for a series of attacks by Flaithbertach Ua Néill, king of the Cenél nEógain, to punish the Ulaid. In 1006, an army led by Flaithbertach marched into Leth Cathail and killed its king, followed by the slaying of the heir of Uí Echach Cobo at Loughbrickland.