Gibbet Rath massacre
1798 CE.
Shown on the map at 53.152°, -6.860°.
The Gibbet Rath executions , sometimes called the Gibbet Rath massacre, refers to the execution of several hundred surrendering rebels by government forces during the Irish Rebellion of 1798 at the Curragh of Kildare on 29 May 1798.
Text from the Wikipedia article Gibbet Rath executions, licensed CC BY-SA 4.0.