|Battle of Mount Badon|
|Part of the Anglo-Saxon settlement of Britain|
Arthur leading cavalry charge at Mount Badon in an 1898 illustration for Idylls of the King
|Commanders and leaders|
|Unknown (possibly King Arthur) (?)||Unknown|
The Battle of Badon 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 Celtic Britons and Anglo-Saxons in 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.
The earliest references to the battle date to the 6th century. It is chiefly known today for the supposed involvement of King Arthur, a tradition that first clearly appeared in the 9th-century Historia Brittonum, possibly written by Nennius. Because of the limited number of sources, there is no certainty about the date, location, or details of the fighting.
The earliest mention of the Battle of Badon is Gildas' De Excidio et Conquestu Britanniae ("On the Ruin and Conquest of Britain"), written in the early to mid-6th century. In it, the Anglo-Saxons are said to have "dipped [their] red and savage tongue in the western ocean" before Ambrosius Aurelianus organized a British resistance with the survivors of the initial Saxon onslaught. Gildas describes the period that followed Ambrosius' initial success:
From that time, the citizens were sometimes victorious, sometimes the enemy, in order that the Lord, according to His wont, might try in this nation the Israel of today, whether it loves Him or not. This continued up to the year of the siege of Badon Hill (obsessionis Badonici montis), and of almost the last great slaughter inflicted upon the rascally crew. And this commences, a fact I know, as the forty-fourth year, with one month now elapsed; it is also the year of my birth.
De Excidio Britanniae describes the battle as such an "unexpected recovery of the [island]" that it caused kings, nobles, priests, and commoners to "live orderly according to their several vocations" before the long peace degenerated into civil wars and the iniquity of Maelgwn Gwynedd.
The battle is next mentioned in an 8th-century text of Bede's Ecclesiastical History of the English People. It describes the "siege of Mount Badon, when they made no small slaughter of those invaders," as occurring 44 years after the first Anglo-Saxon settlement of Britain. Since Bede places that arrival during or just after the joint reign of Marcian and Valentinian III in 449-456, he must have considered Badon to have taken place between 493 and 500. Bede then puts off discussion of the battle - "But more of this hereafter" - only to seemingly never return to it. Bede does later include an extended account of Saint Germanus of Auxerre's victory over the Saxons and Picts in a mountain valley, which he credits with curbing the threat of invasion for a generation. However, as the victory is described as having been accomplished bloodlessly, it was presumably a different occasion from Badon. Accepted at face value, St. Germanus' involvement would also place the battle around 430, although Bede's chronology shows no knowledge of this.
The earliest surviving text mentioning Arthur at the battle is the early 9th-century Historia Brittonum, in which the soldier (Latin m?les) Arthur is identified as the leader of the victorious British force at Badon:
That Arthur had gone unmentioned in the source closest to his own time, Gildas, was noticed at least as early as the 12th-century hagiography which claims that Gildas had praised Arthur extensively but then excised him completely after Arthur killed the saint's brother, Hueil mab Caw. Modern writers have suggested the details of the battle were so well known that Gildas could have expected his audience to be familiar with them.
Geoffrey of Monmouth's c. 1136 Historia Regum Britanniae was massively popular and survives in many copies from soon after its composition. Going into (and fabricating) much greater detail, Geoffrey closely identifies Badon with Bath, including having Merlin foretell that Badon's baths would lose their hot water and turn poisonous. He also mixes in aspects of other accounts: the battle begins as a Saxon siege and then becomes a normal engagement once Arthur's men arrive; Arthur bears the image of the Virgin both on his shield and shoulder. Arthur charges, but kills a mere 470, ten more than the number of Britons ambushed by Hengist near Salisbury. Elements of the Welsh legends are also added: in addition to the shield Pridwen, Arthur gains his sword Caliburnus and his spear, Ron. Geoffrey also makes the defence of the city from the Saxon sneak attack a holy cause, having Dubricius offer absolution of all sins for those who fall in battle.
McCarthy and Ó Cróinín propose that Gildas' 44 years and one month is not a reference to the simple chronology but a position within the 84-year Easter cycle used for computus at the time by the Britons and the Irish church. The tables in question begin in January 438, which would place their revised date of the battle in February 482.
Hirst, Ashe and Wood argue for the site of Liddington Castle on the hill above Badbury (Old English: Baddan byrig) in Wiltshire. This site commands The Ridgeway, which connects the River Thames with the River Avon and River Severn beyond.
The A Text of the Annales Cambriae includes the entry: "The first celebration of Easter among the Saxons. The second battle of Badon. Morgan dies." The date for this action is given by Phillimore as 665, but the Saxons' first Easter is placed by the B Text in its entry 634 years after the birth of Christ and "the second Badon" is not mentioned.
Apart from the professional scholarship, various communities throughout Wales and England carry on local traditions maintaining that their area was the site of the battle: these include Bathampton Down, which has evidence of Dark Age camps, circumvallation entrenchments, and artillery mounds surrounding it; Badbury Rings at the Kingston Lacy House in Dorset; and Bowden Hill in Wiltshire.