1. On July 28, 1864, the Battle of the Big Hole occurred in southwestern Montana. A group of 750 Nez Perce Indians fought against U.S. Cavalry troops in a surprise attack that killed 89 men, women, and children in the Army camp.

2. Yellowstone National Park, located in Montana and Wyoming, was officially established by Congress on July 28, 1872. It was the first national park in the United States and is widely recognized as the world's first national park.

3. The Anaconda Copper Mining Company, one of the largest mining companies in the world, was founded on July 28, 1891. The company's mining operations in Montana were instrumental in the development of the state's economy.

4. On July 28, 1954, a United Airlines passenger plane crashed near Billings, Montana, killing all 52 people on board. The crash was caused by severe turbulence and is still considered one of the deadliest aviation accidents in U.S. history.

5. The Montana State Capitol building, located in the state capital of Helena, was dedicated on July 28, 1912. The building features a stunning copper dome and is home to the offices of the governor, attorney general, and other state officials.