1. In 1863, a group of 26 men from the Oneida tribe enlisted in the Union Army and became Company E of the 50th Wisconsin Infantry Regiment. They were the only Native American unit to fight for the Union during the Civil War.

2. On February 26, 1919, Wisconsin became the first state to ratify the 19th Amendment to the US Constitution, which granted women the right to vote.

3. In 1952, the University of Wisconsin-Madison became the first university in the world to use a nuclear reactor for research and teaching purposes. The reactor, known as the Wisconsin Low Energy Neutron Source (WLENS), is still in operation today.

4. On February 26, 1979, a major blizzard hit Wisconsin and several other Midwestern states, causing widespread power outages, school and business closures, and dozens of deaths and injuries. The storm was later dubbed the "President's Day Blizzard" because it coincided with the federal holiday.

5. In 2005, Wisconsin native Steve Vehlow set a world record for the fastest time to run a marathon while wearing scuba gear. He completed the Lakefront Marathon in Milwaukee in just under six hours, despite having to carry 30 pounds of diving equipment throughout the race.