1. In 1851, the Traverse des Sioux Treaty was signed on August 4, which ceded a significant portion of land from the Dakota people to the United States government. This treaty ultimately led to the U.S.-Dakota War of 1862.

2. On August 4, 1882, the Great Hinckley Fire swept through several counties in Minnesota, killing over 400 people and burning over 200,000 acres of land. It remains one of the deadliest and most destructive fires in Minnesota history.

3. In 1958, August 4 was the date that the St. Lawrence Seaway officially opened, providing a new shipping route from the Atlantic Ocean to the Great Lakes. This had a significant impact on the economy of Minnesota and other states in the region.

4. On August 4, 1999, the Minnesota Lynx played their very first WNBA game, facing off against the Detroit Shock. This marked the beginning of the Lynx's successful tenure in the league, which has included four championships and numerous playoff appearances.

5. In 2007, August 4 was declared "Prince Day" in Minnesota, in honor of the iconic musician's contributions to the state's music scene. Prince, who was born in Minneapolis, was known for his unique sound and flamboyant style, and remains a beloved figure in Minnesota culture.