1926: Beginnings of inquiry about the National Council of American Indians (NCAI) begins with Zitkála-Šá and Theodora Cunningham. The National Congress of American Indians, founded in 1944, continues the work of advocating for Native Americans.

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1917: President Wilson signs the Jones-Shafroth Act, granting U.S. citizenship to Puerto Ricans.
Older 1922 Supreme Court upholds 19th Amendment as constitutional.