1. The Montana State Capitol was dedicated on March 6, 1902. The building, which features a neoclassical design, took several years to construct and was built using Montana sandstone.

2. On March 6, 1853, the United States Army established Fort Benton in Montana. The fort, which was located near the Missouri River, played an important role in the fur trade and served as a supply base for other forts in the region.

3. Montana became a state on November 8, 1889, but it wasn't until March 6, 1890, that President Benjamin Harrison signed the state's official proclamation. This day marked the official recognition of Montana as the 41st state in the U.S.

4. March 6, 1914, saw the opening of the Montana State University Museum. The museum, located on the MSU campus in Bozeman, features exhibits on Montana history, culture, and natural resources.

5. On March 6, 1936, the Anaconda Copper Mining Company announced plans to build a new open-pit copper mine in Montana's Butte district. Known as the Berkeley Pit, the mine would become one of the largest toxic waste sites in the country and would eventually be closed due to environmental concerns.