1. In 1966, the Metropolitan Sports Center in Bloomington opened its doors, becoming the new home of the Minnesota North Stars hockey team. The venue, also known as "The Met," later hosted a variety of concerts and other sporting events before being demolished in 1995.

2. On September 28, 1851, the Treaty of Traverse des Sioux was signed between the United States government and several Dakota Sioux bands. The treaty ceded millions of acres of land in southern Minnesota, eventually leading to the U.S.-Dakota War of 1862 and the forced removal of thousands of Dakota from their ancestral homelands.

3. In 1894, the University of Minnesota football team played its first game against Hamline University. The game ended in a scoreless tie and marked the beginning of a long-standing rivalry between the two schools.

4. On September 28, 1917, the federal government authorized the construction of the Fort Snelling Rifle Range, a military training facility located south of Minneapolis. The range served as an important training ground for soldiers during World War I and II, and was later used for civilian recreation until its closure in 1970.

5. Ray "Boom Boom" Mancini, a professional boxer and former WBA lightweight champion, was born in Youngstown, Ohio on September 28, 1961. Mancini spent much of his career training in Minnesota and fought several bouts in the state, including a title defense against Livingstone Bramble at the Civic Center in St. Paul in 1985.