1. On August 18, 1876, the notorious gang of bank and train robbers known as the James-Younger Gang attempted to rob the Northfield Bank in Northfield, Minnesota. However, the townsfolk fought back and the attempt turned into a bloody shootout, resulting in the deaths of two gang members and two townspeople. The remaining gang members were eventually captured and imprisoned.

2. August 18, 1920 was a historic day in Minnesota as it marked the day the state ratified the 19th Amendment to the US Constitution, granting women the right to vote. Minnesota was the 15th state to ratify the amendment, paving the way for it to become law.

3. The first ever Minnesota State Fair was held on August 18, 1859 in Falcon Heights, Minnesota. The fair has since become one of the largest and most well-attended state fairs in the country, attracting over 2 million visitors annually.

4. On August 18, 1862, the US government declared a state of war with the Dakota people in Minnesota, leading to the devastating Dakota War of 1862. The conflict resulted in the deaths of hundreds of Dakota people, as well as dozens of settlers and soldiers.

5. In 1934, on August 18th, the White Earth Reservation Riot took place in northern Minnesota. The riot was sparked by dissatisfaction with the tribal government and resulted in a clash between tribal members and police officers. Two people were killed and many more were injured. The riot eventually led to significant changes in tribal governance and land rights.