1. On September 18, 1793, Kentucky became the first state to outlaw dueling, a practice that was prevalent among politicians and other prominent figures at the time. The law imposed heavy penalties on those who participated in duels or served as their seconds, and helped to reduce violence in the state.

2. In 1850, the Kentucky Agricultural and Mechanical College (now known as the University of Kentucky) was founded in Lexington, with the goal of providing education in the agricultural, mechanical, and engineering fields. The college played a key role in developing Kentucky's agriculture and industry, and is still a leading research institution today.

3. On September 18, 1880, Lexington's first streetcar system began operation, connecting the downtown area with the university and other parts of the city. The system was powered by horses at first, and later by electricity, and remained in operation until the 1930s.

4. In 1927, a catastrophic flood hit Louisville and other parts of Kentucky, causing widespread damage and loss of life. The flood was caused by heavy rainfall, and was exacerbated by poor drainage systems and inadequate flood control measures. The disaster led to major improvements in Kentucky's infrastructure and emergency management systems.

5. On September 18, 1990, the Kentucky Supreme Court upheld the state's ban on interracial marriage, a law that had been in place since 1904. The decision was overturned by the U.S. Supreme Court in 1967, in the landmark case of Loving v. Virginia, which struck down all remaining state laws prohibiting interracial marriage.