1. In 1857, the United States Congress established the Dakota Territory, which included present-day South Dakota. This marked a significant moment in the state's history, as it set the stage for future statehood.

2. In 1902, a devastating blizzard struck the state, resulting in the loss of hundreds of lives and millions of dollars in property damage. The storm, known as the "Great Easter Blizzard," is still remembered as one of the worst natural disasters in South Dakota history.

3. On March 6, 1899, the University of South Dakota was established in Vermillion. Today, it remains one of the state's premier institutions of higher learning, with a reputation for excellence in research and academics.

4. In 1962, astronaut Walter Schirra visited South Dakota as part of a national tour to promote the Gemini program, a precursor to the Apollo moon missions. Schirra's visit generated significant excitement and publicity in the state, and helped to inspire a new generation of young people to pursue careers in science and technology.

5. Finally, March 6, 1945 saw the beginning of the Battle of Iwo Jima, a critical engagement in the Pacific theater of World War II. Many South Dakotans served in the armed forces during the war, and the state played an integral role in supporting the war effort at home. The sacrifices and contributions of South Dakota's military personnel during this time are still remembered and honored today.