;1002 •
Máel Sechnaill mac Domnaill, without a battle, yields to
Brian Boru,
King of Munster who, effectively becomes
High King of Ireland and reigns until his death in 1014. • Brian Boru makes an expedition to the north to take hostages from the northern states. ;1005 • Brian Boru makes a second expedition to the north to take hostages from the northern states: during this expedition, he visits
Armagh, making an offering of twenty ounces of gold to the church and confirming to the apostolic see of
Saint Patrick, ecclesiastical supremacy over the whole of
Ireland (as recorded in the
Book of Armagh). • Death of
Mael Ruanaidh Ua Dubhda,
King of Uí Fiachrach Muaidhe. ;1006 • Brian Boru makes a triumphal progress around
Leath Cuinn, taking hostages from every northern state, thus demonstrating he is undisputed High King of Ireland. ;1008 •
Gadhra Mór mac Dundach becomes chief of
Síol Anmchadha. • Death of
Madudan mac Gadhra Mór. ==1010s==