"If a line of separation were drawn between the civilized and the savage climates of the globe; between the inhabitants of cities, who cultivated the earth, and the hunters and shepherds, who dwelt in tents, Attila might aspire to the title of supreme and sole monarch of the Barbarians. 13 He alone, among the conquerors of ancient and modern times, united the two mighty kingdoms of Germany and Scythia; and those vague appellations, when they are applied to his reign, may be understood with an ample latitude. Thuringia, which stretched beyond its actual limits as far as the Danube, was in the number of his provinces; he interposed, with the weight of a powerful neighbor, in the domestic affairs of the Franks; and one of his lieutenants chastised, and almost exterminated, the Burgundians of the Rhine." 
"In 413 the Burgundians founded the First Burgundian Kingdom (q.v.), located in Gaul (q.v.) with its capital at Worms (the setting for the great medieval German epic, the Nibelungenlied ). In 443 a second kingdom was established south of Lake Geneva, after a defeat by the Huns (q.v.) that cost King Gundahar and 20,000 Burgundians their lives."
"At dawn on the next day the Romans saw that the fields were piled high with corpses, and that the Huns did not venture forth; they thought that the victory was theirs, but knew that Attila would not flee from battle unless overwhelmed by a great disaster. Yet he did nothing cowardly, like one that is overcome, but with clash of arms sounded the trumpets and threatened an attack. [His enemies] determined to wear him out by a siege. It is said that the king remained supremely brave even in this extremity and had heaped up a funeral pyre of horse trappings, so that if the enemy should attack him he was determined to cast himself into the flames; that none might have the joy of wounding him, and that the lord of so many races might not fall into the hands of his foes. However, owing to dissensions between the Romans and Goths he was allowed to escape to his home land, and in this most famous war of the bravest tribes, 160,000 men are said to have been slain on both sides."
"It is clear enough that some of the characters of the common cycles are historical persons. Thus there can be no doubt that Aetla (Atli, Etzel), king of the Huns, is the famous Hunnish king Attila who died in 453. Again the Burgundian king Guthhere (Gunnarr, Gunther), who plays so prominent a part in the stories of Waldhere and Sigurðr-Siegfried, is clearly identical with the historical Burgundian king Gundicarius (Gundaharius), whose defeat in 435 by the Roman general Aetius is recorded by contemporary writers." 
↑ The History of The Decline and Fall of the Roman Empire, Volume 3