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There was not a "Battle of Worms".This epic poem refers to the destruction of the Burgundians of Worms.
The battle was, in fact, in Belgica Prima (modern day Trier/Luxembourg). namely, in 436 A.D., AΓ«tius engaged the Burgundians in the area of Belgica Prima. Avitus (before he became Emperor) was also involved.
The Burgundians were a Germanic tribe. Worms (Germany) was their original capital, but its name then was "Borbetomagus".
All 3 sources (below) are consistent with the following narrative:
Burgundians
Germanic invaders of Gaul. Originally from Scandinavia, the Burgundians first appeared on the Main River soon after 250, but had little contact with Rome until around 406, when they crossed the Rhine, and under King Gundichar established a kingdom in the province of Germania Prima. In 436, they tried unsuccessfully to occupy Belgica Prima, suffering an appalling defeat at the hands of Flavius AΓ«tius, leading an army of Huns, and only narrowly escaped destruction. This defeat later became the basis of legends retold in the 12th century Middle-High German epic Nibelungenlied.
Source 1: Stanley Sandler,"Ground Warfare: An International Encyclopedia, Volume 1", (ABC-CLIO, 2002), p.133. (for paragraph above)
Source 2: The Oxford Classical Dictionary (Oxford, 2012)
Source 3: "SIDONIUS, Poems. Letters" Haravrd University, Loeb Classical Library