BattlefieldsBattle of Móin Mór
Early Medieval

Battle of Móin Mór

1151
Cork, Ireland
Also known as: Battle of the Great Bog
Era
Early Medieval
Battle Type
Pitched Battle
Location
Cork, Ireland
Status
Unregistered
The Combatants

Who Fought

Defeated
Munster (Toirdelbach mac Cárthaig)
Forces
Toirdelbach mac Cárthaig: c.2,000–4,000.
VS
Victor
Toirdelbach Ua Conchobair (Connacht)
Forces
Toirdelbach Ua Conchobair: c.3,000–6,000
Outcome
Connacht victory; Munster split into two kingdoms
The Battle

History & Significance

Toirdelbach Ua Conchobair, the dominant High King of the early 12th century, defeated Munster and divided it into two kingdoms — Thomond (north) under the Ua Briains and Desmond (south) under the Mac Carthys. This partition weakened Munster permanently and shaped the political geography of the province.

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