Battle of Guoloph
437 CE.
Shown on the map at 51.127°, -1.569°.
The Battle of Guoloph, also known as the Battle of Wallop, purportedly took place in the 5th century. Various dates have been put forward: 440 AD by Alfred Anscombe, 437 AD according to John Morris, and 458 by Nikolai Tolstoy. It took place at what is now Nether Wallop, 15 kilometres southeast of Amesbury, in the district of Test Valley, northeastern Hampshire. The battle was an internal conflict between the rival Britonnic forces of Ambrosius Aurelianus and Vortigern (Vitalinus).
Text from the Wikipedia article Battle of Guoloph, licensed CC BY-SA 4.0.