1. On June 5, 1873, a treaty was signed between the United States government and the Chippewa Indians of Minnesota and North Dakota, which ceded a large tract of land to the government in return for a reservation in Minnesota. The treaty was one of several that led to the displacement of Native American communities in the region.

2. June 5, 1921, marked the beginning of a major oil boom in North Dakota, when a well drilled near Tioga struck oil. Over the next decade, oil production in the state increased dramatically, transforming the economy and landscape of many rural communities.

3. In 1987, North Dakota became the first state in the country to ban smoking in most public places, including restaurants and bars. The law, which went into effect on June 5 of that year, was a major milestone in the public health campaign against tobacco use.

4. June 5, 1999, marked the opening of the Plains Art Museum in Fargo, one of the largest and most respected art museums in the region. The museum features a collection of contemporary and modern art, as well as works by regional artists and a variety of educational programs and events.

5. On June 5, 2016, a major wildfire broke out in the North Unit of Theodore Roosevelt National Park, burning thousands of acres of grassland and sagebrush. The fire was caused by a lightning strike, and while it caused widespread damage, no one was injured and the park ultimately recovered from the blaze.