The Battle of Nibley Green is fought on March 20, 1469 (modern historians will date the battle in 1470—prior to the adoption of the Gregorian calendar in England the start of the new year was 25 March; the battle being fought on March 20 meant it fell into the previous year), between the troops of Thomas Talbot, 2nd Viscount Lisle and William Berkeley, 2nd Baron Berkeley.

It is notable for being the last battle fought in England entirely between the private armies of feudal magnates.