Original sentence: Arthur first appears in historical context as a soldier fighting against the invading Saxons in 5th- to 6th-century Sub-Roman Britain at the Battle of Badon in a text written more than three centuries after his activity.He develops into a legendary figure in the Matter of Britain from the 12th century, following Geoffrey of Monmouth's influential Historia Regum Britanniae.Modern theories concerning the historical origin of Arthur include Dál Riata king Áedán mac Gabráin's son Artúr mac Áedáin in the 6th century, Ambrosius Aurelianus who led the Romano-British resistance against the Saxons and was involved with Badon, a 2nd-century Roman commander of Sarmatian cavalry named Lucius Artorius Castus, British king Riothamus who fought alongside the last Gallo-Roman commanders against the Visigoths in an expedition to Gaul in the 5th century, or an amalgamation of any of them as well as other figures and myths.The historicity of King Arthur is a source of considerable debate among historians, some of whom have suggested that Arthur was a mythological or folkloric figure
Edited sentence: Arthur first appears in historical context as a soldier fighting against the invading Saxons in 5th/6th-century Sub-Roman Britain at the Battle of Badon in a text written more than three centuries after his supposed period of activity.As a legendary king of the Britons of the Matter of Britain, he develops from the 12th century following Geoffrey of Monmouth's influential Historia Regum Britanniae.Modern theories concerning the possibly historical origins of Arthur include the Dál Riata king Áedán mac Gabráin's son Artúr mac Áedáin in the 6th century, Ambrosius Aurelianus who led the Romano-British resistance to the Saxons in the and was recorded in connection with Badon, a 2nd-century Roman commander of Sarmatian cavalry named Lucius Artorius Castus or their descendant, the British king Riothamus who fought alongside the last Gallo-Roman commanders against the Visigoths in an expedition to Gaul in the 5th century, or an amalgamation of any of them as well as other figures and myths.The historicity of King Arthur is a source of considerable debate among historians, some of whom have suggested that Arthur was a mythological or folklore figure