[Introduction (adapted from Davis)]
In 451 CE. Attila the Hun with his horsemen, after having been repulsed before Orleans in Gaul, was brought to bay by Aetius, the Roman general, and his allies, the Germanic Visigoths, Burgundians, and Franks. It should be remembered in this connection that the Huns were, if possible, more hated by the Germans than by the Romans.
History of the Goths, chap. 38:
The armies met in the Catalaunian Plains. The battlefield was a plain rising by a sharp slope to a ridge which both armies sought to gain; for advantage of position is a great help. The Huns with their forces seized the right side, the Romans, the Visigoths and their allies the left, and then began a struggle for the yet untaken crest. Now Theodoric with his Visigoths held the right wing, and Aetius with the Romans the left [of the line against Attila]. On the other side, the battle line of the Huns was so arranged that Attila and his bravest followers were stationed in the center. In arranging them thus the king had chiefly his own safety in view, since by his position in the very midst of his race, he would be kept out of the way of threatened danger. The innumerable peoples of divers tribes, which he had subjected to his sway, formed the wings. Now the crowd of kings---if we may call them so---and the leaders of various nations hung upon Attila's nod like slaves, and when he gave a sign even by a glance, without a murmur each stood forth in fear and trembling, or at all events did as he was bid. Attila alone was king of kings over all and concerned for all.
So then the struggle began for the advantage of position we have mentioned. Attila sent his men to take the summit of the mountain, but was outstripped by Thorismud [crown prince of the Visigoths] and Aetius, who in their effort to gain the top of the hill reached higher ground, and through this advantage easily routed the Huns as they came up. When Attila saw his army was thrown into confusion by the event he [urged them on with a fiery harangue and . . .] inflamed by his words they all dashed into the battle.
And although the situation was itself fearful, yet the presence of the king dispelled anxiety and hesitation. Hand to hand they clashed in battle, and the fight grew fierce, confused, monstrous, unrelenting---a fight whose like no ancient time has ever recorded. There were such deeds done that a brave man who missed this marvelous spectacle could not hope to see anything so wonderful all his life long. For if we may believe our elders a brook flowing between low banks through the plain was greatly increased by blood from the wounds of the slain. Those whose wounds drove them to slake their parching thirst drank water mingled with gore. In their wretched plight they were forced to drink what they thought was the blood they had poured out from their own wounds.
Here King Theodoric [the Visigoth] while riding by to encourage his army, was thrown from his horse and trampled underfoot by his own men, thus ending his days at a ripe old age. But others say he was slain by the spear of Andag of the host of the Ostrogoths who were then under the sway of Attila. Then the Visigoths fell on the horde of the Huns and nearly slew Attila. But he prudently took flight and straightway shut himself and his companions within the barriers of the camp which he had fortified with wagons. [The battle now became confused: chieftains became separated from their forces: night fell with the Roman-Gothic army holding the field of combat.]
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.
Source.
From: William Stearns Davis, ed., Readings in Ancient History: Illustrative Extracts from the Sources, 2 Vols. (Boston: Allyn and Bacon, 1912-13), Vol. II: Rome and the West, pp. 322-325.