1. On July 18, 1837, the Illinois and Michigan Canal was officially opened for business, connecting the Illinois River to Lake Michigan and revolutionizing transportation and commerce in the state.

2. July 18, 1969, marked the first day of the Illinois State Fair, one of the largest agricultural fairs in the country. It has been a beloved summer tradition for over 160 years.

3. In 1984, the Chicago Bears began their training camp at the University of Wisconsin-Platteville, which marked the start of a season that would culminate in the team's first Super Bowl victory.

4. On July 18, 1908, Emma Goldman, a pioneering anarchist and advocate for women's rights, was arrested in Chicago for "advocating public immorality" in her speeches and writings.

5. In 1995, the Illinois General Assembly designated July 18 as National Guard Day in the state, honoring the thousands of Illinoisans who have served and continue to serve in the National Guard.