On June 4, 1919, the United States Congress approved the 19th Amendment and sent it to the states for ratification. The amendment stated that the right to vote could not be denied “on account of sex.” It was ratified on August 18, 1920, after Tennessee became the 36th state to approve it. This event was a major turning point in American history because it recognized women’s constitutional right to vote after decades of organizing, petitioning, marching, writing, lobbying, and public protest.

On June 3, 1965, NASA astronaut Edward H. White II became the first American to walk in space during the Gemini IV mission. White opened the hatch of the Gemini spacecraft and moved outside while attached by a tether and life-support umbilical. His extravehicular activity, or EVA, lasted a little over 20 minutes, marking a major step forward for the United States during the Space Race.

On June 2, 1924, President Calvin Coolidge signed the Indian Citizenship Act, also known as the Snyder Act, into law. The act granted United States citizenship to all Native Americans born within the territorial limits of the United States. This was an important turning point in American history because it addressed citizenship status at the federal level for Native people, many of whom had served in the U.S. military during World War I but still did not have full citizenship recognition.