The Treaty of Traverse des Sioux (1851) between the Sisseton and Wahpeton bands of Dakota and the US government transferred ownership of much of southeastern Minnesota Territory to the United States. Along with the Treaty of Mendota, signed that same year, it opened twenty-four million acres of land to settler-colonists. For the Dakota, these treaties marked another step in a process that increasingly marginalized them and dismissed them from the land that had been—and remains—their home.

Before burning to the ground in 2011, the Swany White Flour Mill was the last remaining nineteenth-century mill in use in Minnesota. Located in Freeport, the mill produced white flour, mixes, and other grain products for more than a century. It was a local landmark and was a frequent stop for people interested in the history of milling and bread baking.

St. Paul's school safety patrol–one of the earliest in the country–was first implemented in 1921. Parents, principals, and politicians in the city were at the forefront of its development. At that time, walking to and from school was dangerous because there were many cars on the roads and few safety guidelines. Children often took risks when crossing streets, and placing other children at intersections to direct traffic was a key innovation that reduced accidents.

In 1962 and 1963, industrial accidents spilled 3.5 million gallons of oil into the Mississippi and Minnesota Rivers. The oil covered the Mississippi River from St. Paul to Lake Pepin, creating an ecological disaster and a demand to control water pollution.

Fur trader and translator George Bonga was one of the first Black people born in what later became the state of Minnesota. His mother was Ojibwe, as were both of his wives. Through these relationships, Bonga was part of the mixed racial and cultural groups that connected trading companies and Native Americans. He frequently guided white travelers and traders through the region. Comfortable in many worlds, Bonga often worked as an advocate for the Ojibwe in their dealings with trading companies and the United States government.

In 2018, the St. Paul Curling Club is the largest curling club in the United States, with over 1200 members. Club members have competed in national and international competitions, including the Olympics. Despite an ebb and flow in its popularity over the years, the club has long been a place to play and promote the sport of curling in the Twin Cities.

Only for only seven seasons, Wonderland Amusement Park brought thrills and sights from Coney Island to Minneapolis. With a roller coaster, fun house, shoot-the-chutes, miniature railroads for kids, a 120-foot lighted tower, and a display of premature babies in incubators, Wonderland drew crowds from all over Minnesota.

Between 1913 and 1914 the Coon Rapids hydroelectric dam was constructed with the intent to provide power to Anoka County. The dam was shut down in 1966 after becoming too expensive to operate. It later became part of Minnesota’s environmental control program.

On the shores of White Bear Lake, Wildwood Amusement Park offered a dance pavilion, swimming, fishing, boating, picnic areas, amusement park rides, and carnival games. For only the cost of the streetcar fare, Twin Cities' residents could spend summer days at this park owned and operated by the Twin Cities Rapid Transit Corporation.

Founded in 1882, the Farmer grew from a small publication produced by Edward A. Webb and his wife to a large magazine with a circulation of over 175,000. For over one hundred years, it was published by the Webb Company in St. Paul.