1. The Battle of Big Hole occurred on June 6, 1877: This battle, also known as the Battle of the Big Hole or the Battle of Wisdom River, was a skirmish between the Nez Perce Tribe and the United States Army during the Nez Perce War. It resulted in a significant loss of life on both sides and had a major impact on the region's history.

2. Montana became a state on June 6, 1889: Montana was admitted to the Union as the 41st state on June 6, 1889. This event had a significant impact on the state's development, as it allowed for increased political representation and access to federal resources and funding.

3. The world's first park dedicated to dinosaurs was established in Montana on June 6, 1935: The first dinosaur fossils were discovered in Montana in the late 19th century, and in 1935, the federal government established the Two Medicine Dinosaur Center, the world's first park dedicated to dinosaur fossils.

4. A severe hailstorm struck Billings, Montana on June 6, 2017: On this day, a severe hailstorm struck Billings, causing widespread damage to homes, businesses, and vehicles. The storm was notable for producing hailstones up to 4 inches in diameter, making it one of the largest hailstorms in Montana history.

5. Montana celebrated its 150th anniversary of statehood on June 6, 2014: 2014 marked the 150th anniversary of Montana's admission to the Union, and the state celebrated with a variety of events and activities, including parades, concerts, and historical reenactments. The anniversary highlighted Montana's unique history and diverse cultural heritage.