The Battle of Badon /ˈbeɪdən/ also known as the Battle of Mons Badonicus (Latin: obsessio[nis] Badonici montis, "Blockade/Siege of the Badonic Hill"; Bellum in monte Badonis, "Battle on Badon Hill"; Bellum Badonis, "Battle of Badon"; Old Welsh: Badon; Middle Welsh: Gweith Vadon, "Battle of Badon"; Welsh: Brwydr Mynydd Baddon, "Battle of Badon Mount/Hill") was a battle purportedly fought between Britons and Anglo-Saxons in Post-Roman Britain in the late 5th or early 6th century. It was credited as a major victory for the Britons, stopping the encroachment of the Anglo-Saxon kingdoms for a period.