1. Idaho became a state on September 14, 1890, becoming the 43rd state in the United States.
2. In 1864, on September 14, Chief Joseph of the Nez Perce tribe led a successful raid on U.S. Army troops in eastern Oregon. This event was one of many conflicts between Indigenous tribes and U.S. forces over land and resources.
3. Idaho's oldest continuously operating theater, the Egyptian Theatre in Boise, opened on September 14, 1927. The theatre is known for its unique Egyptian revival style architecture and has hosted many famous performers over the years.
4. On September 14, 1957, the United States Atomic Energy Commission detonated a nuclear bomb at the site of the Idaho National Laboratory in Butte County. The explosion was part of the U.S. government's nuclear testing program during the Cold War and was one of more than 900 such tests conducted in the Nevada and Idaho desert regions.
5. The Sun Valley Lodge in Ketchum, Idaho, was officially dedicated on September 14, 1936. The lodge was one of the first ski resorts in the United States and played a significant role in the growth of winter tourism in Idaho. The lodge has hosted many famous guests over the years, including Ernest Hemingway and Marilyn Monroe.