Battle of Lostwithiel
1644 CE.
Shown on the map at 50.408°, -4.667°.
The Battle of Lostwithiel took place over a 13-day period from 21 August to 2 September 1644, around the town of Lostwithiel and along the River Fowey valley in Cornwall during the First English Civil War. A Royalist army led by Charles I of England defeated a Parliamentarian force commanded by the Earl of Essex. Although Essex and most of the cavalry escaped, between 5,000 and 6,000 Parliamentarian infantry were forced to surrender. Since the Royalists were unable to feed so many, they were given a pass back to their own territory, arriving in Southampton a month later having lost nearly half their number to disease and desertion. Considered one of the worst defeats suffered by Parliament over the course of the Wars of the Three Kingdoms, it secured South West England for the Royalists until early 1646.
Text from the Wikipedia article Battle of Lostwithiel, licensed CC BY-SA 4.0.