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Emerald Archives presents Ireland’s story one reference year at
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article explores the evidence, people, places and developments
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politics, society, religion, culture, conflict, everyday life and
changing landscapes in one continuously expanding timeline. New
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Archives Under Construction: 2,711 Years Shared — In Progress: 1423 CE — Available Archives: 24
15th Century Ireland CE
Trim’s New Lieutenant
Archived: 20 October 2026
In 1424, Ireland’s political map was defined less by a single national struggle than by a series of overlapping lordships, rival dynasties and negotiated allegiances. The English crown governed most directly from Dublin and its surrounding lordship, but royal office depended upon the cooperation of magnates whose power reached well beyond the formal limits of crown administration. Gaelic rulers, Hiberno-Irish dynasties and English settlers all made and remade local political worlds through warfare, tribute, marriage, submission and the possession of castles.
Mortimer’s Trim Death
Archived: 20 October 2026
In 1425, Edmund Mortimer, the king’s lieutenant and earl of March and Ulster, died suddenly at Trim while pursuing agreements with northern Gaelic lords. His death undermined a fragile settlement, followed by arrests of visitors and worsening Ulster conflict. James Butler, earl of Ormond, became lieutenant and negotiated written alliances with the Meic Mathghamhna and Éoghan Ó Néill. In Connacht, Toirrdelbach Ruad Ó Conchobair died and Cathal, son of Ruaidrí, succeeded amid violence. Brian Ballach Mac Uí Néill Buidhe was killed at Carrickfergus. Severe winter weather devastated cattle, crops and people, while records showed religious and learned life across Ireland.
Naghtan’s Ransom and Escape
Archived: 20 October 2026
In 1426, Ireland comprised overlapping English, Gaelic and Gaelicised jurisdictions rather than a unified state. Naghtan O'Donnell was ransomed from English captivity by his brother Niall, who provided extensive property and hostages; Turlough O'Donnell subsequently escaped with four fellow hostages. Annals record successions, deaths and kin violence, including O'Brien inauguration, Mac Mahon’s killing, and O'Conor losses. Reconciliation between Owen O'Neill and O'Neill aimed to recover alienated lands. Learned historians, hospitality, penance and plague also feature. Dublin received royal compensation for earlier military service, while an Ormond deed leased Kilkenny mills, demonstrating administrative, economic and seigneurial institutions alongside regional personal power.
Edenderry and the Returning King
Archived: 20 October 2026
In 1427, Ireland’s fragmented political order was shaped by dynastic rivalry, constrained English administration and local military action. Donnchadh Mac Murchadha, king of Leinster, returned after eight years’ imprisonment in England, challenging his brother Gerald’s authority while receiving English support. Lord Grey briefly assumed the lieutenancy, reliant on local deputies amid fiscal and factional weakness. English or Anglo-Irish forces demolished Edenderry Castle, while an Ulster coalition led by Niall Garbh Ó Domhnaill defeated MacQuillan’s forces, taking prisoners and booty. Annalistic obituaries emphasised penitence, hospitality and charitable guest-houses, demonstrating that reputation, kinship and religious patronage remained central to power and standing.
Kinsale’s Pilgrim Lord
Archived: 20 October 2026
In 1428, Irish annals recorded no single national crisis but interconnected regional events. Aedh Mag Uidhir, a Fermanagh lord returning from pilgrimage to Compostela, died at Kinsale on 11 August and was buried at Cork, illustrating maritime, religious and political links. His death coincided with Maguire dynastic violence, including seizure of his sons’ castle and the killing of Aedh Óg. In Leinster, Donnchadh Mac Murchadha Caomhánach’s ransom, return and cooperation with English authority reflected negotiated power. Deaths of ecclesiastical and local rulers, notably a Mac Conmara chief, reveal hereditary offices, patronage, protection and peace as foundations of Ireland’s diverse lordships.
Aghakilmore’s Field of Defeat
Archived: 20 October 2026
The best-documented Irish event of 1429 was a major defeat at Achadh Cille Móire, now generally identified with Aghakilmore in County Cavan. It was not a battle between two neatly bounded nations. Rather, it grew from the shifting alliances, rival branches and armed followings that shaped lordship in the Breifne borderlands. The annals place it firmly in this year, while their differing emphases also reveal why a single encounter could matter far beyond the field on which it was fought.
Thomas Maguire’s Fermanagh Succession
Archived: 20 October 2026
In 1430, Irish political life was marked by warfare, negotiation and succession rather than an island-wide event. Tomás Mág Uidhir died on 13 November after thirty-six years ruling Fermanagh, and his son Tomás Óg succeeded with publicly affirmed support. Eóghan O’Neill raided Oriel and Meath, securing tribute, submissions and a hostage without permanently conquering these territories. In Cork, Kilbrittain castle changed hands amid MacCarthy and Desmond conflict. Raids and rival claims affected Connacht and Breifne, where sanctuary and éraic enabled settlement. Deaths of clerics and legal scholars underline ecclesiastical and learned institutions’ roles in authority, hospitality, memory and social order.
Ballymagauran’s Vengeful Burning
Archived: 20 October 2026
In 1431, Ireland experienced raids, reprisals, dynastic conflict and institutional losses. Sir Thomas Stanley's delayed arrival as royal lieutenant left the English lordship constrained around Dublin, though chancery business continued. After John Maguire was killed in Tullyhaw, Tomás Óg Maguire ravaged the district and burned Ballymagauran. O'Neill, Maguire and O'Reilly devastated MacQuillan territory, while hostage negotiations and O'Donnell rivalries reshaped Ulster. Gaelic and English forces conducted reciprocal raids in Breifne and Leinster. Deaths of bishops, clerics, poets and nobles underscored the fragility of lordship. Warfare damaged crops and homes, yet religious, learned and administrative institutions endured amid mobile local power.
Eóghan’s Stone at Tullaghoge
Archived: 20 October 2026
In 1432, Domhnall Bog Ó Néill was killed in Ó Catháin territory, enabling his rival Eóghan, son of Niall Óg, to be inaugurated king of Tír Eóghain at Tullaghoge with clerical and learned support. Eóghan’s alliance with Sligo provoked conflict with Niall Garbh Ó Domhnaill of Tír Conaill, bringing armed diplomacy, Erne crossings, prolonged campaigning, burned settlements and crops. Raids exposed Armagh’s vulnerability, while bishops and learned families remained centres of hospitality, law and memory. Elsewhere, Ormond attacked Éile and Mac Murchadha challenged English power in Leinster. The year revealed fragmented authority, shifting alliances, and legitimacy unable to secure peace.
Ardglass Fire and Quin
Archived: 20 October 2026
In 1433, regional conflict, diplomacy, famine and patronage shaped Ireland. Eóin Ó Néill, aided by Mac Domhnaill’s Scottish fleet, campaigned against Niall Garbh Ó Domhnaill and MacQuillan in Dufferin, devastating creaghts and burning Ardglass. Negotiations by Niall Garbh’s wife and subordinate rulers halted a proposed attack, while subsequent travel produced peace at Caol Uisce. In Breifne, Mag Raghnaill factional warfare involved paid soldiers. Severe summer famine accompanied notable hospitality by Mag Uidhir and Margaret Ó Cearbhaill. Pope Eugenius IV licensed Franciscan Regular Observance at Quin, reinforcing Mac Conmara patronage and linking local lordship to wider ecclesiastical reform currents across Europe.
