As an AI language model, I cannot guarantee the absolute accuracy of the facts below, but here are some interesting events that occurred on June 14 in Wisconsin history:

1. In 1880, the first telephone exchange in Eau Claire, Wisconsin was established. The exchange was initially located in the home of one of its operators, and by the end of the year, it had over 40 subscribers.

2. On June 14, 1919, the Volstead Act was passed by Congress, which established prohibition in the United States. Wisconsin was one of the states that initially rejected the act, and many people continued to brew and consume alcohol illegally.

3. In 1972, the Oshkosh B'Gosh clothing company was founded in Oshkosh, Wisconsin. The company originally produced denim overalls for children, but later expanded to include other types of clothing.

4. On June 14, 1984, the Milwaukee Brewers baseball team broke a major league record by hitting four home runs in a row during a game against the Texas Rangers. The Brewers went on to win the game 7-5.

5. In 2019, a tornado touched down in the town of Mangonia, Wisconsin, causing extensive damage to homes and businesses. The tornado was later classified as an EF-3, with wind speeds of up to 140 miles per hour.