1. In 1821, the Treaty of Traverse des Sioux was signed between the Dakota and the US government, ceding millions of acres of land to the government in exchange for annuities, goods, and services.

2. In 1861, the Civil War's first major engagement west of the Mississippi River took place in southwestern Missouri. Minnesota troops played a significant role in the Battle of Wilson's Creek.

3. In 1895, the University of Minnesota's School of Agriculture held its first classes. It was the first college in the state to focus specifically on agricultural education.

4. In 1937, the first successful intra-state passenger airline service in the US began operating between Duluth and Minneapolis. The service was operated by Northwest Airways, which later became Northwest Airlines.

5. In 1969, the Minnesota Twins won their first-ever American League Western Division championship, clinching it with a win over the Kansas City Royals. They went on to face the Baltimore Orioles in the American League Championship Series.