In 1898, four hundred members of the Fifteenth Minnesota Volunteer Infantry were hospitalized with typhoid after camping at the Minnesota State Fairgrounds. U.S. Army surgeons decided the epidemic's source was the public water of Minneapolis.
The U.S.–Dakota War of 1862 was a turning point in Minnesota history. Joseph Godfrey, an escaped slave, joined the Dakota in their fight against white settlers that summer and fall. He was one of only two African Americans to do so.