Battle of Killala
1798 CE.
Shown on the map at 54.212°, -9.222°.
The Battle of Killala was an engagement during the Irish Rebellion of 1798. It was fought on Sunday, 23 September 1798, between forces of the British Crown and a combined force of Irish rebels and a small number of French troops at Killala, County Mayo, Ireland.
Text from the Wikipedia article Battle of Killala, licensed CC BY-SA 4.0.