1. On May 30, 1892, the Battle of Wounded Knee began in South Dakota. The conflict, between the United States Army and members of the Lakota tribe, resulted in hundreds of deaths, marking a tragic event in the history of Native American communities.

2. In 1930, Charles A. Lindbergh Jr. visited Sioux Falls, South Dakota, as part of his nationwide tour to promote aviation. Lindbergh, who had made history completing the first solo flight across the Atlantic Ocean in 1927, gave a speech at the Sioux Falls airport and met with local officials.

3. On May 30, 1958, South Dakota became the first state to officially recognize the Memorial Day holiday. The legislation, aimed at honoring American soldiers who had died in wars, was later adopted by the federal government and is celebrated nationwide.

4. In 1988, the Mount Rushmore National Memorial in South Dakota celebrated its 50th anniversary. The iconic monument, which features the carved faces of four U.S. presidents, has become a popular tourist attraction and a symbol of American democracy.

5. On May 30, 1992, the Crazy Horse Memorial in South Dakota held its dedication ceremony. The monument, which depicts the Oglala Lakota warrior, is still under construction and is expected to be the largest sculpture in the world when completed. The Crazy Horse Memorial is also intended to honor the Native American culture and history of the region.