1. On October 23, 1864, the Battle of the Little Bighorn took place in Montana. This was a significant event in U.S. history, as it was one of the most famous battles between Native Americans and the U.S. Army.

2. On October 23, 1876, the Northern Pacific Railroad Company completed the first rail line through Montana, connecting the state with the rest of the country.

3. On October 23, 1904, the town of Billings was officially incorporated. Today, Billings is the largest city in Montana and serves as the economic hub for the state.

4. On October 23, 1922, the Montana State College (now Montana State University) and the University of Montana played their first football game against each other. The game ended in a tie.

5. On October 23, 1984, Montana Governor Ted Schwinden dedicated the new Capitol Complex in Helena. The complex includes several state government buildings, including the Montana State Capitol building.