1. On December 15, 1890, the famous Battle of Wounded Knee occurred in South Dakota, which was a turning point in Native American history. Montana had a significant involvement in the battle as many people from Montana had arrived as part of the US Cavalry to suppress Native American uprisings.

2. On December 15, 1938, a severe blizzard hit Montana, disrupting transportation and infrastructure across the state. The blizzard caused multiple fatalities and millions of dollars in damage, leading to widespread devastation and hardship.

3. December 15, 1954, marked the grand opening of the famous Yellowstone National Park’s Old Faithful Inn after it had been rebuilt due to a fire in 1950. The inn is considered one of the most impressive hotels in the country and continues to attract tourists from all over the world to Montana.

4. On December 15, 1989, a magnitude 6.9 earthquake struck in northwest Montana, causing significant property damage and numerous injuries. It was one of the most substantial earthquakes in Montana history and was felt as far away as Seattle and Canada.

5. December 15, 2008, marked the opening of the Museum of the Rockies’ “Cowboy Legends” exhibit in Bozeman, Montana. The museum is an important cultural hub in Montana, showcasing a range of exhibits related to the natural and cultural history of the state. The exhibit celebrates Montana’s rich cowboy heritage and the role that cowboys have played in shaping the state’s history.