structural:reformatting, structural:expansion, structural:summarization, quality:corruption, stylistic:style_transfer
Migration to Gaul

Around 370, according to Ammianus, the peaceful relations between the Alans and Huns were broken, after the Huns attacked the Don Alans, killing many of them and establishing an alliance with the survivors. These Alans successfully invaded the Goths in 375 together with the Huns. They subsequently accompanied the Huns in their westward expansion.

Following the Hunnic invasion in 370, other Alans, along with other Sarmatians, migrated westward. One of these Alan groups fought together with the Goths in the decisive Battle of Adrianople in 378 CE, in which emperor Valens was killed. As the Roman Empire continued to decline, the Alans split into various groups; some fought for the Romans while others joined the Huns, Visigoths or Ostrogoths. A portion of the western Alans joined the Vandals and the Suebi in their invasion of Roman Gaul. Gregory of Tours mentions in his Liber historiae Francorum ("Book of Frankish History") that the Alan king Respendial saved the day for the Vandals in an armed encounter with the Franks at the crossing of the Rhine on December 31, 406). According to Gregory, another group of Alans, led by Goar, crossed the Rhine at the same time, but immediately joined the Romans and settled in Gaul.

Under Beorgor (Beorgor rex Alanorum), they moved throughout Gaul, till the reign of Petronius Maximus, when they crossed the Alps in the winter of 464, into Liguria, but were there defeated, and Beorgor slain, by Ricimer, commander of the Emperor's forces.

In 442, after it became clear to Aetius that he could no longer rely upon the Huns for support, he turned to Goar and persuaded him to move some of his people to settlements in the Orleanais in order to control the bacaudae of Armorica and to keep the Visigoths from expanding their territories northward across the Loire. Goar settled a substantial number of his followers in the Orleanais and the area to the north and personally moved his own capital to the city of Orleans.

Under Goar, they allied with the Burgundians led by Gundaharius, with whom they installed the Emperor Jovinus as usurper. Under Goar's successor Sangiban, the Alans of Orléans played a critical role in repelling the invasion of Attila the Hun at the Battle of Châlons. In 463 the Alans defeated the Goths at the battle of Orléans, and they later defeated the Franks led by Childeric in 466. Around 502–503 Clovis attacked Armorica but was defeated by the Alans. However, the Alans, who were Chalcedonian Christians like Clovis, desired cordial relations with him to counterbalance the hostile Arian Visigoths who coveted the land north of the Loire. Therefore, an accord was arranged by which Clovis came to rule the various peoples of Armorica and the military strength of the area was integrated into the Merovingian military.