1. The first Illinois state constitution was ratified on December 6, 1818. It was an important moment in Illinois history that established the framework for the state's government and institutions.

2. On December 6, 1830, Chief Keokuk of the Sac and Fox tribes signed a treaty with the US government that ceded over six million acres of land to the United States. This contributed to the displacement of Native Americans in Illinois and the westward expansion of the country.

3. The Illinois Supreme Court ruled on December 6, 1850, in the case of Bailey v. Cromwell, that slaves brought into the state by their owners were not automatically free, even though Illinois was a free state. The ruling upheld the controversial Fugitive Slave Act of 1850 and angered many anti-slavery activists.

4. The Chicago Daily News published its first issue on December 6, 1875. It quickly became one of the most popular and influential newspapers in the city and the country, known for its bold reporting and investigative journalism.

5. On December 6, 1969, the infamous police raid on the Black Panther Party headquarters in Chicago took place. The raid resulted in the deaths of two Black Panther leaders, Fred Hampton and Mark Clark, and led to widespread protests and controversy over police brutality and civil rights in the city.