> [[m-speidel]]. "Berserks: A History of Indo-European "Mad Warriors"". *Journal of World History*. 13 (2): 253–290. [doi](https://doi.org/10.1353%2Fjwh.2002.0054), [ISSN](https://www.worldcat.org/issn/1045-6007), [jstor](https://www.jstor.org/stable/20078974), [S2CID](https://api.semanticscholar.org/CorpusID:162397267), [pdf](a/m-speidel2002.pdf) > **Wikipedia Summary:** > Historian [Michael P. Speidel](https://en.wikipedia.org/wiki/Michael-P.-Speidel "Michael P. Speidel") has compared the fighting madness and dancing frenzy of the [Aztec](https://en.wikipedia.org/wiki/Aztecs "Aztecs") Quachics wolf-warriors with the Germanic mad wolf-warriors ([Berserks](https://en.wikipedia.org/wiki/Berserker "Berserker")), and has argued that this could be due to shared historical origins–or perhaps a feature common to warrior societies: the more willing a warrior is to attack recklessly, the more useful he may be in battle. > > Wikipedia contributors. "Ancient North Eurasian: Comparative Mythology". *Wikipedia, The Free Encyclopedia*. Accessed 1 January 2021. <https://en.wikipedia.org/w/index.php?title=Ancient-North-Eurasian&oldid=997283555)>