1. On June 27, 1844, the first officially recorded baseball game in Wisconsin was played in Milwaukee between the Pioneer and the Red Jacket teams. The match ended in a tie with a score of 12-12.

2. The University of Wisconsin-Madison was founded on June 27, 1848, under the name Wisconsin State University. The institution is now one of the largest and most prestigious public universities in the United States.

3. On June 27, 1922, the Schooner Vernon sank in Lake Michigan near Port Washington, Wisconsin, after colliding with the steamer Senator. All 10 crew members aboard the Vernon were rescued, but the ship was lost.

4. Milwaukee's Summerfest, one of the largest music festivals in the world, began on June 27, 1968. The inaugural event attracted over 165,000 people to the shores of Lake Michigan and featured performances by local artists.

5. On June 27, 2013, the U.S. Supreme Court struck down the federal Defense of Marriage Act, which defined marriage as between a man and a woman. The ruling paved the way for same-sex couples in Wisconsin and other states to legally marry and enjoy the same rights as heterosexual couples.