Knockmoy and Trim
Archived: 26 October 2026
Abstract
In 1224, Cathal Crobhderg Ua Conchobair’s death at Knockmoy ended a Connacht reign and enabled his son Áed’s swift, but contested, succession. Cathal had combined authority with diplomacy towards Henry III, seeking security for Connacht and recognition of Áed. Meanwhile William Marshal suppressed Hugh de Lacy’s rebellion, retaking Trim Castle through campaigning supported by Anglo-Norman and Gaelic allies. Áed joined these wider struggles, attacking castles and resisting rivals backed by Áed Ua Néill. Church life included Cathal’s Cistercian burial, learned clerics, and the arrival of Dominicans. War, weather and livestock disease disrupted agriculture, exposing dependence on cattle, supplies and alliances.