Editing Ulaid (section)

===11th century===
In 1000 the Viking [[Kingdom of Dublin|king of Dublin]], [[Sigtrygg Silkbeard]], was expelled by [[Brian Boru]] the [[High King of Ireland]], and was refused sanctuary by the Ulaid.<ref name="Hudson86-7"/> Eventually Sigtrygg was forced to return to Dublin and submitted to Brian.<ref name="Corrain123"/> Sigtrygg didn't forget the Ulaid's refusal,<ref name="Hudson86-7"/> and in 1001 his fleet plundered [[Inch Abbey|Inis Cumhscraigh]] and [[Kilclief|Cill Cleithe]] in Dál Fiatach, taking many prisoners.<ref name="AOFM1001"/> Sigtrygg's forces also served in Brian's campaigns against the Ulaid in 1002 and 1005.<ref name="Hudson86-7"/><ref name="Hudson95"/>

At Craeb Telcha in 1003 the Northern Uí Néill and Ulaid fought a major battle, the Ulaid inauguration site.<ref name="MIaE493"/><ref name="Clontarf26"/><ref name="PlacenamesCraeb"/> Here Eochaid mac Ardgail, and most of Ulaid's nobility were slaughtered, along with the Northern Uí Néill king.<ref name="MIaE493"/><ref name="Clontarf26"/> The result was a bloody succession war amongst the princes of the Dál Fiatach, who also had to war with the Dál nAraidi who eyed the kingship.<ref name="Clontarf138-9"/>

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.<ref name="Clontarf138-9"/> 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.<ref name="Clontarf138-9"/> 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.<ref name="Clontarf151-4"/> In 1006, an army led by Flaithbertach marched into [[Lecale|Leth Cathail]] and killed its king, followed by the slaying of the heir of Uí Echach Cobo at [[Loughbrickland]].<ref name="Clontarf151-4"/>

The battle of Craeb Telcha resulted in the inability of the Ulaid to provide any useful aid to Boru, when in 1006 he led an army made up of men from all over Ireland in an attempt to force the submission of the Northern Uí Néill.<ref name="Clontarf26"/><ref name="Clontarf151-4"/> Having marched through the lands of the Cenél Conaill and Cenél nEógain, Boru led his army across the River Bann at Fersat Camsa (Macosquin) and into Ulaid, where he accepted submissions from the Ulaid at Craeb Telcha, before marching south and through the traditional assembly place of the [[Conaille Muirtheimne]] at ''i n-oenach Conaille''.<ref name="Clontarf151-4"/>

Flaithbertach Ua Néill continued his attacks on Ulaid in 1007, attacking the Conaille Muirtheimne.<ref name="Clontarf151-4"/> In 1011, the same year Boru finally achieved hegemony over the entire of Ireland, Flaithbertach launched an invasion of Ulaid, and after destroying Dún Echdach (Duneight, south of Lisburn) and the surrounding settlement, took the submission of the Dál Fiatach, who had the Ulaid kingship, thus removing them from Boru's over-lordship.<ref name="Clontarf168-9"/> The next year, Flaithbertach raided the Ards peninsula and took an uncountable number of spoils.<ref name="Clontarf168-9"/>

At Ulfreksfjord in 1018, a combined force of native Irish, led by a king called Conchobar, and their Norse allies, led by Eyvind Urarhorn, defeated a major Viking expedition launched by the [[Earl of Orkney]], [[Einar Sigurdsson]], who was aiming to re-assert [[Sigurd the Stout|his father's]] lordship over the seaways between Ireland and Scotland.<ref name="Pedersen271"/><ref name="Snorri330"/> 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.<ref name="Pedersen231"/><ref name="Hudson108-9"/> Niall followed up this victory in 1026 attacking Finn Gall, a Viking settlement just north of Dublin itself.<ref name="Pedersen231"/><ref name="Hudson108-9"/>

Sigtrygg's nephew, [[Ímar mac Arailt|Ivar Haraldsson]], plundered [[Rathlin Island]] just off the north coast of Ulaid in 1038 and again in 1045.<ref name="Hudson136"/> The latter attack saw Ímar kill Ragnall Ua Eochada, the heir-apparent of Ulaid and brother of Niall mac Eochaid, along with three hundred Ulaid nobles.<ref name="Hudson136"/><ref name="Tigernach1045"/><ref name="AOFM1045"/> In retribution Niall again attacked Finn Gall.<ref name="Hudson136"/> In 1087, a son of the king of Ulaid, allied with two grandsons Ragnall, attacked the [[Isle of Man]] in a failed attempt to oust [[Godred Crovan]], king of Dublin and [[kingdom of the Isles|the Isles]].<ref name="Pedersen233"/><ref name="Oram32"/><ref name="AoU1087"/>

At the end of the 11th century, the Ulaid had a final revival under Donn Sléibe mac Echdacha, from whom descended the Mac Dúinn Shléibe—anglicised MacDonlevy—kings that ruled Ulaid in the 12th century, with the Dál Fiatach kingship restricted to their dynasty after 1137.<ref name="Byrne128"/> They developed close ties with the [[kingdom of the Isles]].<ref name="MIaE493"/> The Mac Dúinn Shléibe kings desperately maintained the independence of Ulaid from the Mac Lochlainn rulers of the Northern Uí Néill.<ref name="ANHoI17"/>