1. On September 9, 1822, Henry Hastings Sibley arrived at Fort St. Anthony (now known as Fort Snelling) to take charge of the fur trade in the region. Sibley later became the first governor of Minnesota.

2. The Northern Pacific Railway completed its line through Minnesota on September 9, 1873. The railway facilitated the transportation of people and goods throughout the state and helped to spur economic development.

3. The University of Minnesota admitted its first female students on September 9, 1920. Prior to this, the university had been an all-male institution.

4. The Minnesota Twins set a major league baseball record on September 9, 1965, by hitting four inside-the-park home runs in a single game against the Kansas City Athletics. The Twins went on to win the game 9-4.

5. On September 9, 2016, Minnesota Governor Mark Dayton declared a state of emergency in response to protests over the Dakota Access Pipeline. The pipeline, which passes near the Standing Rock Sioux reservation in North Dakota, was opposed by many Native American groups and environmental activists due to concerns about its impact on the environment and sacred lands.