At Gettysburg, 262 members of the First Minnesota Volunteer Infantry Regiment charge a much larger Confederate force, succeeding in slowing their advance but resulting in 215 casualties—a stunning 82 percent. The next day, the remaining soldiers help repel Pickett's charge, capturing the flag of the Twenty-eighth Virginia Regiment in the process.
The Western Federation of Miners calls a strike on the Mesabi Iron Range. Two hundred union men had been laid off from Mountain Iron Mine, owned by the Oliver Iron Mining Company, a subsidiary of US Steel. Although layoffs on the range were common, at issue was recognition of the union, which was threatened by the discharge of only union workers. Within two months a large number of imported scabs undermine the union's efforts and the strike is broken.
Two people are killed and sixty-seven are injured in a clash between strikers and police during a truckers' strike in Minneapolis. After federal mediation fails, Governor Floyd B. Olson declares the city under martial law, and the National Guard takes control of the streets.
Lewis Cass, governor of Michigan (which at the time included present-day Minnesota), reaches what he erroneously believes to be the source of the Mississippi River: a lake called Gaa-miskwaawaakokaag (where there are many red cedars) by the Ojibwe. Afterward, settler-colonists began to call it Cass Lake.
The members of Captain Stephen Kearny's expedition to find a road from Council Bluffs, Iowa, to Fort St. Anthony (later called Fort Snelling) arrive at Lake Pepin, having lost their way. Kearny then marches his men north to the fort.
James J. Hill arrives in St. Paul to work as a shipping clerk for J. W. Bass and Company. He later made his fortune as a railroad baron and business tycoon.
Joseph A. A. Burnquist is born in Dayton, Iowa. Between 1915 and 1921 he would serve as the nineteenth governor of the state and lead the Minnesota Commission of Public Safety. He died in Minneapolis on January 12, 1961.
The Sabathanites Drum Corps, an African American drum corps founded in 1964, participates in the Aquatennial Parade in Minneapolis after boycotting the event for forty-three years. Drum corps members began the boycott in 1967 after police attacked several drum corps members as they marched in the parade.
Father Francis Pierz, a Slovene priest, arrives at his post in Grand Portage. He remains there for a few months and then returns in 1841 to establish a mission on the Pigeon River. His later writings encourage Germans and Slovenes to immigrate to the "earthly paradise of Minnesota."
The Sisseton and Wapheton Dakota sign the Treaty of Traverse des Sioux, near St. Peter. Maḣpiya Wic̣aṡṭa (Cloud Man) and Iṡtaḣba (Sleepy Eye) are among the Dakota signers, while Alexander Ramsey and Luke Lea represent the United States, with missionary Stephen Riggs interpreting.
A mob attacks the Brainerd jail, where two Ojibwe brothers, Te-be-ke-ke-sheck-wabe and Go-go-once, are being held for allegedly murdering a woman. The men are taken to a nearby pine tree and hanged in front of a crowd of 1,000. After the lynching, a rumor spread among Brainerd's residents that angry Ojibwe were planning to attack the town. Sheriff John Gurrell telegraphed Governor Horace Austin for help. Three companies of troops were sent out, arriving on July 25.
Princeton-area farmer O. J. Odegard is the first to utilize the labor of Axis prisoners of war when he requests 100 Italian POWs for farm work due to the acute labor shortage in Mille Lacs County. Odegard is forced to pay the average wage for farm work, $3.00 per prisoner per day, and the prisoners and forty armed guards arrive from Camp Clark, Missouri, on September 5. Provided with kitchen facilities, the prisoners prepare their own food, and, in fact, they are such skilled cooks that their guards prefer their meals over standard army fare.
Geographer Joseph N. Nicollet is born in France. After traveling by canoe to Omashkoozo-zaaga'igan (later called Lake Itasca) in 1836 and to Inyan Sa K'api, a pipestone quarry sacred to Dakota people, in 1838, he published a map of the upper Mississippi River's drainage system in 1843.
Pitcher Ila Borders of the Duluth-Superior Dukes is the first woman to win a men's regular season professional baseball game. The Dukes beat the Sioux Falls Canaries 3-1, in Duluth.
In New Ulm, a group of at least 6,000 attends a rally at Turner Park to protest the policy of sending draftees of German descent to fight in World War I.
The US Senate votes 96-0 to denounce David Durenberger for "reprehensible" conduct as a senator, making him one of only seven members to be publicly condemned by the Senate in the twentieth century. Durenberger is censured for financial misconduct, including evading the limit on outside earnings.
Colonel Henry Leavenworth performs a marriage ceremony for Lieutenant Green, one of the officers at Fort St. Anthony (later called Fort Snelling), and a woman named Miss Gooding. Leavenworth has legal authority to perform marriages not as post commander, but as Indian agent for the lands east of the Mississippi, so he and the couple cross the river for the ceremony.