1. On December 13, 1845, Wisconsin became the 30th state to be admitted to the Union. The state's path to statehood was a contentious one, with debates over issues such as the rights of Native Americans and the issue of slavery.

2. In 1909, a massive blizzard struck Wisconsin on December 13 and lasted for three days. The storm dumped over three feet of snow in some areas, and caused widespread power outages and transportation disruptions. Many people were stranded in their homes or on trains and trolleys.

3. The University of Wisconsin-Milwaukee was founded on December 13, 1956. The school has since become one of the largest universities in the state and a leading research institution.

4. On December 13, 1985, a fire broke out in the Green Bay Packers' locker room at Lambeau Field. The fire caused significant damage to the facility, but no one was injured. The cause of the fire was never determined.

5. In 2002, the Wisconsin State Capitol was closed to the public on December 13 due to security concerns in the aftermath of the 9/11 attacks. The closure was part of a nationwide effort to increase security at government buildings and public spaces.