Founded in 1824, the Bureau of Indian Affairs or Office of Indian Affairs is an agency of the federal government of the United States within the U.S. Department of the Interior. It is responsible for the administration and management of land held in trust by the United States for Native Americans and Alaska Natives.
Mentioned in UNLADYLIKE2020 profiles about Zitkála-Šá: https://unladylike2020.com/profile/zitkala-sa/ and Susan LaFlesche Picotte: https://unladylike2020.com/profile/susan-la-flesche-picotte/