My short list of Indian warfare before the White Man arrived.
https://frontierpartisans.com/3942/crow-creek-massacre/
https://www.academia.edu/7907221/Mass_Grave_at_Crow_Creek_in_South_Dakota_Reveals_How_Indians_Massacred_Indians_in_14th_Century_Attack
http://www.dickshovel.com/scalp.html
http://westerndigs.org/skeletons-in-utah-cave-are-victims-of-prehistoric-war-study-says/
https://mcclungmuseum.utk.edu/1991/12/01/scalping-victim/
http://westerndigs.org/infamous-mass-grave-of-young-women-in-ancient-city-of-cahokia-also-holds-men-study/
http://westerndigs.org/mass-grave-of-prodigal-sons-in-california-poses-prehistoric-mystery/
https://www.archaeology.org/news/2269-140630-colorado-torture-evidence
https://anthropology.net/2007/07/16/parallel-life-and-death-1275-ad-massacred-gallina-and-vanishing-anasazi/
https://ancientstandard.com/2007/07/17/csi-new-mexico-%e2%80%93-possible-genocide-ca-1275-ad/
https://archive.archaeology.org/9709/newsbriefs/anasazi.html
https://anthropology.net/2007/07/16/parallel-life-and-death-1275-ad-massacred-gallina-and-vanishing-anasazi/
https://www.ohio.edu/orgs/glass/vol/1/14.htm
Thanks for the links. Validation. I’ve seen some but not all of those.