Looks like the “tomahawk chop” to me.
This kinda thing happened to a LARGE PERCENTAGE of “ immigrants” up thru the Little Big Horn up until Wounded Knee—when it stopped.
Schenectady NY, my old stomping grounds, was ONLY wiped out THREE times back in the day.
It isn't PC to talk about American Indian atrocities (anymore).
But Humans do strange things when faced with starvation.