1. On March 27, 1814, the Treaty of Fort Jackson was signed between the United States and the Creek Nation, ending the Creek War. This treaty ceded millions of acres of land from the Creek Nation to the United States, leading to the forced removal of many Creek people from their ancestral lands.

2. March 27, 1837 saw the birth of Thomas C. Carter in Prairie du Rocher, Illinois. Carter would go on to serve as a United States Representative from Montana and was also a member of the Illinois House of Representatives.

3. On March 27, 1912, the first electric traffic signal was installed in Chicago, Illinois. This invention revolutionized the way traffic was controlled and paved the way for the modern traffic light system we use today.

4. March 27, 1977 marked the end of the Great Blizzard of 1977 in Illinois. This severe snowstorm impacted the entire state and caused widespread damage and transportation disruptions.

5. On March 27, 2015, the Illinois General Assembly voted to legalize same-sex marriage in Illinois. This historic legislation made Illinois the 16th state to allow same-sex couples to legally marry.