1. Theodore Roosevelt Visits North Dakota: On September 30, 1910, former President Theodore Roosevelt visited Bismarck, North Dakota as part of his tour of the western United States. During his visit, he gave a speech in which he praised the state's natural beauty and encouraged its residents to continue to preserve and protect it.

2. Birth of North Dakota State University: On September 30, 1890, the North Dakota Agricultural College (now North Dakota State University) officially opened its doors to students. The college was originally established as an agricultural and mechanical school, and has since grown to become a comprehensive university offering a wide range of programs.

3. The Lignite Industry Takes Off: On September 30, 1916, the first commercial lignite coal mine in North Dakota began operations near Beulah. This marked the beginning of the state's lignite industry, which has since become a major economic driver for the region.

4. The Last Days of Sitting Bull: On September 30, 1890, Sitting Bull, the famous Sioux leader, returned to his home at Standing Rock reservation after a period of exile. The next day, on December 15, he would be killed in a confrontation with Indian police.

5. Hiram Fong Visits North Dakota: On September 30, 1963, Hiram Fong, a Republican Senator from Hawaii, spoke at a campaign rally in Grand Forks, North Dakota. Fong was the first person of Chinese descent to serve in the United States Senate, and his visit to North Dakota was part of a larger campaign to rally support for the Republican Party in the run-up to the 1964 presidential election.