1. In 1851, the Treaty of Traverse des Sioux was signed between the Sisseton Wahpeton Sioux and the United States government. The treaty ceded a large portion of land in what is now North Dakota to the government, paving the way for settlement by European-Americans.

2. In 1902, the town of Williston was incorporated in northwest North Dakota. It was named after James Willis Sheahan, a late 19th-century politician from Chicago who was an advocate for western expansion.

3. In 1920, North Dakota became the first state to ratify the 19th Amendment to the United States Constitution, which granted women the right to vote. The state's legislature voted unanimously in favor of ratification, and the amendment went into effect later that year.

4. In 1953, a major tornado struck the town of Fargo, North Dakota, causing widespread damage and killing 12 people. The tornado was part of a larger outbreak that affected several other states in the region.

5. In 2014, the University of North Dakota retired its controversial "Fighting Sioux" nickname and logo. The name had been the subject of debate and protest for years, with critics arguing that it was disrespectful to Native Americans. The university ultimately decided to retire the name and logo in order to comply with NCAA policies on ethnic mascots.