Siege of Exeter
1068 CE.
Shown on the map at 50.726°, -3.530°.
The siege of Exeter occurred early in 1068 when King William I of England marched a combined army of Normans and loyal Englishmen westwards to force the submission of the city of Exeter in Devon, a stronghold of Anglo-Saxon resistance against Norman rule following the Norman conquest of England. After a siege lasting eighteen days, the city surrendered to William under generous terms and allowed the Normans to consolidate their hold over the West Country.
Text from the Wikipedia article Siege of Exeter (1068), licensed CC BY-SA 4.0.