The Battle of Guoloph, also known as the Battle of Wallop, took place in the 5th century. Various dates have been put forward: 440 AD by Alfred Anscombe,[1] 437 AD according to John Morris,[2] and 458 by Nikolai Tolstoy.[3] It took place at what is now Nether Wallop,[citation needed] 15 kilometers southeast of Amesbury, in the district of Test Valley, northeastern Hampshire.51°07′39″N 1°34′10″W / 51.127440°N 1.569520°W The battle was an internal conflict between the rival Britonnic forces of Ambrosius Aurelianus and Vortigern (Vitalinus).[4]