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350 to 375 Native American men, women and children were killed or wounded in America's last major engagement with the Plains Indians. The US Army's 7th Cavalry casualties were 31 KIA and 33 WIA.
Sources:
https://www.history.com/this-day-in-history/u-s-army-massacres-indians-at-wounded-knee
https://www.cmohs.org/medal
https://www.wearethemighty.com/articles/6-special-benefits-that-medal-of-honor-recipients-are-entitled-to-get/