1. In 1864, the Idaho Territory was divided into two regions: the eastern half became Montana Territory and the western half remained Idaho Territory.
2. In 1929, the Union Pacific Railroad opened the Lucin Cutoff, a railway line that shortened the distance between Ogden, Utah and Lucin, Utah by 44 miles, passing through Idaho's Great Salt Lake Desert.
3. In 1957, the National Reactor Testing Station (now Idaho National Laboratory) successfully tested the first nuclear reactor to generate electricity for a power grid, making Idaho the first state in the world to use nuclear power for electrical generation.
4. In 1962, the Idaho State University football team made history by defeating the University of Utah football team in the first ever college football game played on an artificial turf field, located in Pocatello, Idaho.
5. In 1988, the Idaho State Capitol building in Boise was added to the National Register of Historic Places. The landmark building was completed in 1912 and features neo-classical architecture and iconic dome.