1. In 1862, the Battle of Dry Creek occurred in what is now Beaverhead County. A group of around 150 members of the Beaverhead County militia clashed with a band of Piegan Native Americans, resulting in several fatalities on both sides.

2. On September 19, 1910, a fire known as the "Big Blowup" swept through several national forests in Montana and Idaho, burning over 3 million acres and killing 85 firefighters. It remains one of the deadliest wildfires in United States history.

3. In 1934, Montana native Jeannette Rankin became the first woman elected to the United States House of Representatives. Rankin was a lifelong pacifist and the only member of Congress to vote against both World War I and World War II.

4. Popular country musician John Denver died on September 19, 1997 while flying an experimental aircraft over the coast of California. Although not a Montana native, Denver had a strong connection to the state and wrote several songs that were inspired by its natural beauty.

5. On September 19, 2011, a small earthquake with a magnitude of 4.2 struck near Seeley Lake in western Montana. Although the earthquake caused no damage, it served as a reminder that the state is not immune to seismic activity - according to the United States Geological Survey, there have been over 300 recorded earthquakes in Montana since 1872.