1. On July 20, 1836, the Wisconsin territorial legislature approved the formation of Walworth County. The county was named after Reuben H. Walworth, who served as Chancellor of the State of New York.

2. In 1881, the Milwaukee and Northern Railroad Company began service between Milwaukee and Sheboygan, with stops in several towns along the way. The railroad provided a faster and more convenient mode of transportation for passengers and freight.

3. July 20, 1919 marked the end of the 2-week-long Rusk County potato strike. The strike was led by immigrant workers who demanded better pay and working conditions. Their efforts resulted in some improvements, but also led to the deportation of some of the organizers.

4. 1933 saw the dedication of the new Wisconsin State Capitol building, which had been under construction since 1906. The building is an iconic example of the Wisconsin State Capitol style and is home to the Wisconsin State Legislature, the Governor, and other state offices.

5. July 20, 1950 was the opening day of the first Wisconsin State Fair held at the new Wisconsin State Fair Park in West Allis. The fair has since become a beloved tradition in Wisconsin and attracts visitors from all over the state and beyond.