Battle of Oulart Hill
1798 CE.
Shown on the map at 52.505°, -6.390°.
The Battle of Oulart Hill took place on 27 May 1798 when a rebel gathering of between approximately 1,000 annihilated a detachment of 110 militia sent from Wexford town to stamp out the spreading rebellion in County Wexford.
Text from the Wikipedia article Battle of Oulart Hill, licensed CC BY-SA 4.0.