1. On May 10, 1869, the last spike of the Transcontinental Railroad was driven in Promontory Summit, Utah. This event marked the completion of the first transcontinental railroad in the United States, which had significant impacts on Wisconsin's economy and transportation industry.

2. On May 10, 1871, the town of Peshtigo, Wisconsin, was nearly destroyed by a forest fire that killed an estimated 1,500 people. This disaster remains the deadliest wildfire in U.S. history, and the event had lasting impacts on Wisconsin's forestry industry and conservation efforts.

3. On May 10, 1933, Wisconsin became the first state to officially recognize Mother's Day as a holiday. This decision was made by Governor Philip La Follette and continues to be celebrated annually on the second Sunday in May.

4. On May 10, 1944, the U.S.S. Starlight, a naval tanker built in Wisconsin, was torpedoed and sunk by a German submarine. The ship was transporting much-needed fuel and supplies to Allied forces in Europe during World War II, and this event had significant impacts on the war effort.

5. On May 10, 2012, Wisconsin Governor Scott Walker survived a recall election, becoming the first governor in U.S. history to do so. The recall effort was launched in response to Walker's controversial budget repair bill, which had significant impacts on Wisconsin's labor relations and political landscape.