1. On June 28, 1864, a historic battle took place in Montana that is now known as the Battle of the Little Bighorn. It was fought between the US Army and the Lakota Sioux, Northern Cheyenne, and Arapaho tribes. The battle resulted in a devastating defeat for the US Army, and it is considered one of the most significant events in Montana's history.

2. In 1880, on June 28, the first passenger train arrived in Butte, Montana. The train linked Butte to the rest of the country and helped to fuel the growth of the mining industry in the area.

3. On June 28, 1917, the Anaconda Copper Mining Company, one of the largest mining companies in Montana, was indicted on charges of violating the Sherman Antitrust Act. The company was accused of conspiracy to monopolize the copper industry in the United States.

4. In 1934, on June 28, Montana became the first state to elect a female governor without a spouse who had previously been governor. The woman was named Ella T. Grasso.

5. On June 28, 1982, a major earthquake hit the town of West Yellowstone, Montana. The earthquake had a magnitude of 6.1 on the Richter scale and caused significant damage to the town and surrounding areas.