1. In 1951, the University of Illinois announced the invention of the first computer modem, which allowed computers to communicate over phone lines. This was a major breakthrough in computer technology and paved the way for advancements in modern telecommunications.

2. On November 12, 1833, the first issue of The Chicago Tribune, one of the oldest and most influential newspapers in the United States, was published. The paper has covered major events in Illinois history, such as the Great Chicago Fire and the rise of Al Capone.

3. In 2013, the state of Illinois became the 16th state to legalize same-sex marriage. This landmark legislation was signed into law by Governor Pat Quinn and represented a major victory for LGBTQ+ rights in the state.

4. On November 12, 1864, General William Tecumseh Sherman began his famous "March to the Sea" from Atlanta, Georgia to Savannah, Georgia, during the American Civil War. Many soldiers from Illinois fought in the Civil War and played a significant role in the Union's victory.

5. In 1986, the Chicago Bears defeated the Detroit Lions 13-7 in a historic NFL game. This victory marked the Bears' first division title in over two decades and set the stage for the team's Super Bowl victory the following year. Chicago Bears fans still celebrate November 12 as a memorable day in the team's history.