Dear Mr. Cushman,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located The Dawes Act of 1887 and the Indian Reorganization Act of 1934 in the General Records of the United States Government (Record Group 11) that may be of interest. Both have been digitized and are available using the Catalog.
For an overview of the U.S. Indian policy and Indian Reservation land, we suggest that you review the Indian Land Tenure Foundation’s website.
We hope this is helpful. Best of luck with your research!
[Information provided by Cody White, Subject Matter Expert]