1. In 1848, Wisconsin held its first constitutional convention in Madison. The convention resulted in the drafting of a state constitution, which was later adopted that same year and paved the way for Wisconsin's admission to the Union.

2. In 1911, the Milwaukee Road (Chicago, Milwaukee, St. Paul and Pacific Railroad) became the first railroad to use electric locomotives in regular service. The electrification of the line between Harlowton, Montana and Avery, Idaho was a significant engineering feat and marked a significant milestone in the development of electric transportation.

3. On May 23, 1962, ground was broken for the construction of the General Electric nuclear fuel reprocessing plant in Winnebago County, Wisconsin. The facility was intended to process spent nuclear fuel rods for reuse in nuclear power reactors and was among the first of its kind in the United States.

4. In 1974, the University of Wisconsin System was established. The system includes 13 universities and serves over 170,000 students each year. The UW System is also one of the largest employers in the state of Wisconsin.

5. On May 23, 1992, the Milwaukee Brewers' Robin Yount broke the American League record for career hits by a shortstop. Yount hit his 3,022nd hit, surpassing Cleveland Indians' Hall of Famer, Lou Boudreau. Yount retired in 1993 with 3,142 hits, ranking him 17th on the all-time list.