1. In 1805, the Lewis and Clark Expedition passed through what is now Montana on October 28th. They encountered a group of Salish Indians near the confluence of the Bitterroot River and Clark Fork River.

2. In 1890, Montana became the 41st state in the United States. Governor Joseph K. Toole signed the state's constitution and the territory officially became a state on October 28, 1890.

3. In 1915, the University of Montana's first homecoming celebration took place on October 28th. The event included a parade, bonfire, football game, dance, and other festivities that are still part of homecoming traditions today.

4. In 1949, the deadliest plane crash in Montana's history occurred on October 28th. A United Airlines DC-3 crashed into a mountain near Bozeman, killing all 21 people on board. It is believed that the crash was due to poor weather conditions and pilot error.

5. In 1983, the Montana Historical Society unveiled a new exhibit on October 28th called "Montana: The People and the Land." The exhibit featured artifacts, photographs, and interactive displays that showcased Montana's history, people, and culture. The exhibit is still on display at the Montana Historical Society's museum in Helena.