1. On December 10, 1864, a battle known as the Battle of the Big Hole took place in southwestern Montana. It was fought between United States Army troops and a band of Nez Perce Indians. The battle resulted in significant casualties on both sides.

2. In 1934, Montana became the first state in the United States to establish a state-owned liquor store. The store was opened in Butte on December 10 of that year.

3. On December 10, 1955, the first commercial airline flight landed at the newly constructed Gallatin Field airport in Bozeman. The flight was operated by Northwest Airlines and originated in Minneapolis.

4. In 1998, the Montana Historical Society opened a new museum in Helena. The museum features exhibits on Montana's history, culture, and natural resources.

5. December 10 is also recognized as Human Rights Day, commemorating the adoption of the Universal Declaration of Human Rights by the United Nations General Assembly in 1948. Montana has a strong tradition of advocacy for human rights and civil liberties, demonstrated in its history of supporting women's suffrage, civil rights, and environmental protection.