Hostages and High Kings – Emerald Archives

In 1165, Ireland was governed through a shifting hierarchy of provincial kings, regional rulers and local dynasties rather than by a single central administration. Muirchertach Mac Lochlainn, king of Cenél nEógain and claimant to the high-kingship, stood near the summit of his power. His authority rested on military alliances, tribute, hostages and the ability to intervene in other kingdoms. Yet the year’s record shows how quickly obedience could become rebellion. The principal crisis came in Ulaid, where Mac Lochlainn’s attempt to impose a settlement combined devastating warfare with elaborate diplomacy. Elsewhere, dynastic upheaval affected Munster and Osraige, conflict spread through Meath and Bréifne, and Ruaidrí Ua Conchobair of Connacht continued building the coalition that would soon challenge northern supremacy.

Revolt in Ulaid

The Annals of Ulster firmly place a revolt by the Ulaid in 1165. They turned against Mac Lochlainn and attacked neighbouring peoples associated with his political order. Raids struck the Uí Méith, eastern Uí Bresail and Dál Riata. Cattle were carried away and many people were killed. These were not incidental border disturbances. Cattle-raiding removed portable wealth, provisions and breeding stock while publicly demonstrating that an overlord could not protect his dependants.

Mac Lochlainn answered with a major hosting drawn from Cenél nEógain, Cenél Conaill and Airgialla. His army entered Ulaid, ravaged the country and inflicted heavy casualties. The Annals of Ulster say that the principal churches were spared, although the Annals of Tigernach more broadly describe both church lands and secular districts as devastated. The difference cautions against treating either account as a complete campaign report. Both agree on the essential outcome: Eochaid Mac Duinn Sléibe, king of Ulaid, was expelled, hostages were taken, and another member of the ruling dynasty, Donn Sléibe, was installed.

A further expedition targeted Inis Locháin, an island stronghold probably associated with the lower Bann region, although its precise identification is not entirely certain. The island was burned and dismantled. Mac Lochlainn’s followers returned with ships, treasure and the visible rewards of victory. The episode reveals the importance of waterways and defended islands in northern warfare. A crannog or river island could serve as a residence, refuge, storehouse or prison, but it could also become a concentrated target when an enemy possessed boats and sufficient manpower.

The Armagh Settlement

Eochaid attempted to recover his kingdom but was rejected by Ulaid leaders who feared Mac Lochlainn’s response. Donnchad Ua Cerbaill, king of Airgialla, then imprisoned him on Mac Lochlainn’s orders. Ua Cerbaill was nevertheless more than an obedient subordinate. He was Eochaid’s foster-father and a major ruler whose territories linked the north with the Boyne valley. He interceded for the captive, and both men approached Mac Lochlainn at Armagh. There Eochaid was restored, but only under severe conditions.

The price included treasure, gold and hostages from throughout Ulaid. The son of every principal chief was demanded, together with Eochaid’s own daughter. Scholarly study has emphasised how exceptional the recorded surrender of a female hostage was. These young people embodied the obedience of their families and made renewed revolt personally dangerous. Among the valuables transferred was an object called the sword of the earl’s son, though the annals do not securely identify its original owner. Eochaid also yielded Bairche, a district in southern Down, to Mac Lochlainn, who granted it to Ua Cerbaill. Political submission therefore altered territory as well as personal relationships.

A townland was granted to the clergy of Saul, the Patrician church in County Down, as part of the settlement. Armagh’s role was equally significant. The city was not merely a place of worship: as the seat associated with Patrick’s successor and revered relics, it offered a setting in which agreements acquired sacred weight. Kings sought clerical witnesses and spiritual guarantees because military power alone rarely created a durable peace. The arrangement of 1165 temporarily restored Eochaid, but it also left Mac Lochlainn holding hostages and land while Ua Cerbaill’s honour was tied to the settlement.

Wars Across the Midlands

Conflict also intensified between Meath and Bréifne. Sitriuc Ua Ruairc, an important member of the Bréifne dynasty, was killed by the Uí Ciarda and the people of Cairbre. Ruaidrí Ua Conchobair and Tigernán Ua Ruairc retaliated with raids into Cairbre and territories in Meath and Leinster. The Annals of Tigernach also record Ruaidrí granting western Meath to Diarmait Ua Máel Sechlainn. Such grants were claims to overlordship rather than transfers administered by a permanent state. Their effectiveness depended on armies, local allies and the recipient’s ability to hold the territory.

Ruaidrí also led a hosting into Desmond and obtained hostages from Diarmait Mac Carthaig. This extended Connacht’s influence into the south and demonstrated that Mac Lochlainn was not the only ruler capable of demanding submissions far beyond his home province. Ireland’s high-kingship remained competitive: a claimant had to travel, campaign, reward supporters and repeatedly collect pledges. Ruaidrí’s movements in 1165 were therefore an important preparation for the reversal of power that followed in 1166.

Munster experienced its own dynastic change. The annals differ slightly in wording, but agree that Tairdelbach Ua Briain lost effective control to his son Muirchertach. One account says the father went on pilgrimage to Killaloe while his son remained king of Dál Cais; another describes him as expelled from the kingship. In Osraige, Domnall Mac Gilla Pátraic was killed in fighting against the Laois forces of the Uí Mórdha, along with other prominent men. These episodes show that succession within a royal family could be as disruptive as conflict between kingdoms.

Dublin and the Irish Sea

Events beyond Ireland also drew upon Irish resources. The Annals of Ulster report that the people they call the Saxons and the Foreigners of Dublin joined the “son of the Empress” — Henry II of England — in his unsuccessful Welsh campaign. A Welsh account instead suggests that ships from Dublin and other Irish towns reached Chester late in the expedition and were dismissed after receiving payment. The accounts differ over the fleet’s practical contribution, but agree that Dublin vessels were recruited.

This episode demonstrates the continuing maritime strength of Hiberno-Norse Dublin and the close political world of the Irish Sea. Dublin’s shipowners and warriors could serve rulers in Britain while the city remained subject to Irish overlords, particularly Diarmait Mac Murchada of Leinster. The port supported sailors, merchants, craftsmen and commercial networks reaching Britain and continental Europe. Its participation in 1165 should not be treated as a straightforward prelude to the later invasion of Ireland, but it reveals that Irish and Angevin interests had already met through ships, money and military service.

Faith, Learning and Daily Life

The Church of 1165 combined older Irish institutions with reforms encouraged by bishops and continental religious orders. Mellifont, founded in 1142 with the support of Donnchad Ua Cerbaill, had introduced Cistercian observance and architecture. Armagh’s Patrician authority, the land grant to Saul and the effort to place settlements under ecclesiastical protection show that older saints’ cults remained politically potent. Reform did not separate religion from kingship; churches, relics and senior clergy continued to mediate between rulers.

The annals preserve one unusually direct glimpse of ordinary hardship: the Annals of Tigernach record a great snow that made movement difficult for both people and cattle. For a society dependent upon livestock, seasonal travel and outdoor labour, deep snow threatened fodder supplies, communications and food production. Rural life centred on mixed farming and animal husbandry, with many households occupying unenclosed settlements or farmsteads associated with older ringfort landscapes. Spinning, weaving, woodworking and metalworking were embedded in domestic and specialist production, while cattle remained both subsistence resources and political currency.

Learning also flourished amid warfare. The manuscript now called the Book of Leinster was being assembled during the mid-twelfth century, with much of its work probably belonging to the 1160s, although no particular section can be assigned securely to 1165. Its mixture of saga, genealogy, history, place-name lore, grammar and religious learning reflects the range expected of elite Irish scholars. Such manuscripts preserved inherited knowledge while serving contemporary dynasties concerned with ancestry, status and rightful rule.

An Unstable Triumph

Mac Lochlainn ended the year outwardly victorious. Ulaid had been defeated, its king restored on restrictive terms, strategic land redistributed and hostages secured. Yet the settlement depended upon his continued respect for guarantees made before Ua Cerbaill and the Church. The Annals of Ulster date Mac Lochlainn’s blinding of Eochaid and the resulting collapse of his support to 1166, although Mac Carthaigh’s Book groups the episode under a confused 1165–66 heading. It should not be presented as a securely dated event of 1165. Nevertheless, the crisis that caused it was created during this year. The triumphs of 1165 exposed both the reach of Irish over-kingship and its fragility: power could be accumulated through armies and hostages, but a broken settlement could rapidly turn allies into avengers.

Primary Sources

Tags: Four Masters, High Kings, Hostages and High Kings, Ireland Year by Year, Mac Lochlai, Primary SourcesThe Annals