Preeti Aroon in The Aerogram:
Bhagat Singh Thind was born in Punjab and immigrated to the United States in 1913. A judge later granted him naturalization, but that decision was appealed and Thind’s case eventually made its way to the Supreme Court, as described in the 1923 Literary Digestarticle “Hindus Too Brunette to Vote Here,” available through the South Asian American Digital Archive.
The laws of the time limited naturalization to just “free white persons” and “aliens of African nativity and…persons of African descent,” so Thind’s legal strategy was to prove that he was white.
Read the whole thing here.