English: An historical map showing the Hun invasion of Gaul in 451 CE (AD), leading to the Battle of Chalons. The generally accepted routes are shown, along with the larger cities threatened or sacked by the Huns. Various sources give conflicting information on whether some cities were sacked, in particular Trier. Man says "no", while Ferrill says "yes". Most other sources agree with Ferrill. There are also several cities southeast of Troyes which were said to have been sacked, including Auxerre, Besancon, and Langres.