1. In 1851, the Treaty of Traverse des Sioux was signed, which transferred land from the Dakota people to the United States government. The treaty is controversial and seen as a prime example of broken promises made to Native American tribes.

2. In 1919, the University of Minnesota's law school opened. It was the first law school in the state and had just 23 students in its first class.

3. On September 20, 1975, the first women's marathon was held in Minnesota. It was part of the Twin Cities Marathon and had 39 participants.

4. Minnesota native Bob Dylan was awarded the Nobel Prize in Literature on September 20, 2016. Dylan is the first musician to receive the award and his win was both celebrated and criticized.

5. In 2018, Minnesota native and former Vice President Walter Mondale turned 90 years old on September 20. Mondale served as Vice President under Jimmy Carter from 1977 to 1981 and ran for President himself in 1984.