The Viking victory at Islandbridge in 919 ended Irish efforts to expel the Uí Ímair, killing the High King and five other Irish rulers.
Key Facts
- Date
- 14 September 919
- Irish commander killed
- Niall Glúndub, High King of Ireland
- Viking commander
- Sitric Cáech of the Uí Ímair
- Irish kings killed
- 6 (including Niall Glúndub)
- Outcome
- Decisive Viking victory
Location
Cause → Event → Consequence
Following Viking settlements in Ireland, particularly at Dublin, the native Irish undertook a series of military campaigns to expel the Uí Ímair Vikings. Niall Glúndub, overking of the Northern Uí Néill and High King of Ireland, assembled a coalition of Irish kings to challenge Viking power centred at Dublin.
On 14 September 919, at Islandbridge near Dublin, a coalition of native Irish forces under Niall Glúndub clashed with the Dublin Vikings of the Uí Ímair led by Sitric Cáech. The battle ended in a decisive defeat for the Irish, with Niall Glúndub and five other Irish kings slain on the field.
The defeat at Islandbridge effectively ended the coordinated Irish effort to drive the Vikings from Ireland. The loss of the High King and multiple regional rulers in a single engagement severely weakened Irish resistance, consolidating Viking control of Dublin and securing Uí Ímair power in Ireland.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Niall Glúndub.
Side B
1 belligerent
Sitric Cáech.