Charles Alexander Eastman was an American physician, writer, and social reformer. He was the first Native American to be certified in Western medicine and was "one of the most prolific authors and speakers on Sioux ethnohistory and American Indian affairs" in the early 20th century.

The Dakota are a Native American tribe and First Nations band government in North America. They compose two of the three main subcultures of the Sioux people, and are typically divided into the Eastern Dakota and the Western Dakota.