1. In 1905, Idaho's first state fair was held at Caldwell. The fair showcased the state's agricultural, industrial, and mining products.

2. On April 26, 1917, the United States declared war on Germany, officially entering World War I. This declaration of war had a significant impact on Idaho and the rest of the country, as it led to a massive mobilization effort and the drafting of millions of young men to fight overseas.

3. In 1934, the first legal gambling in Idaho was allowed when the state legislature authorized betting on horse races. However, it wasn't until 1988 that Idaho voters approved the creation of the state lottery.

4. On April 26, 1945, the Soviet army liberated the Sachsenhausen concentration camp near Berlin, Germany. This event marked the end of the Holocaust and the liberation of millions of people who had been imprisoned and persecuted by Nazi forces.

5. In 1954, the College of Idaho, a private liberal arts college in Caldwell, became the first college in the United States to offer a wilderness studies program. The program, which is still in existence today, teaches students about ecology, outdoor skills, and environmental ethics through hands-on experiences in the natural world.