1. Idaho Territory Created: On July 3, 1863, the Idaho Territory was created after the United States Congress passed a bill establishing a new territory in the Pacific Northwest. This marked the beginning of Idaho's journey towards statehood.

2. First Celebration of the Fourth of July: On July 3, 1865, Idaho City held the first Fourth of July celebration in the newly formed Idaho Territory. The celebration included a parade, fireworks, and a speech from Governor Caleb Lyon.

3. Sheepeater Indian War: On July 3, 1879, the Sheepeater Indian War erupted in central Idaho. The conflict between the U.S. Army and the Sheepeater Indians lasted for over a year and resulted in the forced relocation of the Sheepeater tribe to the Fort Hall Reservation in Idaho.

4. Ernest Hemingway's Birthday: On July 3, 1899, Ernest Hemingway was born in Oak Park, Illinois. Hemingway would later become a beloved literary figure in Idaho, where he spent many years writing and living in Ketchum before his death.

5. Minidoka National Historic Site Established: On July 3, 2001, President George W. Bush signed a bill establishing the Minidoka National Historic Site in south central Idaho. The site commemorates the internment of Japanese Americans during World War II at the Minidoka War Relocation Center, which was in operation from 1942-1945.