This article from Rewire.News connects the US policy of family separation at the US border with Mexico to its history of separating indigenous families, including the use of "Indian boarding schools" as a means of separating Native children from their families, communities, and culture, as well as the current overrepresentation of Native children in foster care in the US. "Before the enactment of the 1978 Indian Child Welfare Act (ICWA) that governs removal and placements of Native kids," says the article "25 to 35 percent of Native children were being taken from their families, according to NICWA." The article also notes the high numbers of missing Native children which "led the U.S. Senate to declare May 5 a National Day of Awareness for Missing and Murdered Native Women and Girls two years in a row."
