Siege of Helmsley Castle
1644 CE.
Shown on the map at 54.245°, -1.064°.
Helmsley Castle was a Royalist stronghold in North Yorkshire during the First English Civil War. It was besieged by Parliamentarian forces in September 1644 and surrendered on 22 November after a siege of two to three months.
Text from the Wikipedia article Siege of Helmsley Castle, licensed CC BY-SA 4.0.