Oklahoma Indian Welfare Act

The Oklahoma Indian Welfare Act of 1936 (also known as the Thomas-Rogers Act) is a United States federal law that extended the 1934 Wheeler-Howard or Indian Reorganization Act to include those tribes within the boundaries of the state of Oklahoma. The purpose of these acts were to rebuild Indian tribal societies, return land to the tribes, enable tribes to rebuild their governments, and emphasize Native culture.

Source: Wikipedia — Oklahoma Indian Welfare Act (CC BY-SA 4.0)