1. In 1964, the Anaconda Company announced plans to build a refinery in Billings, Montana. The refinery, which would eventually become the largest in Montana, began operations in 1979 and produced petroleum products for over 30 years.

2. On October 14, 1991, the Montana State University - Bozeman campus was closed due to an unexpected snowstorm. The storm dumped over 17 inches of snow on the campus, causing widespread power outages and disrupting travel across the state.

3. In 1944, the city of Butte, Montana saw its worst mining disaster when an underground explosion killed 30 miners. The disaster, which was caused by a buildup of flammable gases, prompted safety improvements in the mining industry.

4. On October 14, 1967, rock band The Doors played at the University of Montana in Missoula. The concert was one of the early stops on their "Strange Nights of Stone" tour, which launched the band to international fame.

5. In 1917, Montana became the first state to give women the right to vote in presidential elections. The state had already granted women the right to vote in state elections in 1914, ahead of the national movement for women's suffrage.