1. In 1864, the Idaho Territory was established by President Abraham Lincoln, with Lewiston chosen as the capital. This marked an important milestone in Idaho's history and brought more attention and development to the region.

2. On September 30, 1887, the Idaho Volunteer Cavalry returned home from their service in the Nez Perce War. The cavalry played a significant role in the conflict, and their return was celebrated with parades and festivities.

3. In 1904, the Tramway and Terminal Company was established in Boise, Idaho. This company built electric streetcars that provided transportation around the city, connecting various neighborhoods and businesses.

4. On September 30, 1919, the Idaho State Capitol building was officially completed and dedicated. The building, which is now listed on the National Register of Historic Places, features a neoclassical style and houses the offices of the Governor, Secretary of State, and other state officials.

5. In 1989, the Shoshone-Bannock Tribes signed a historic agreement with the State of Idaho. The agreement allowed the tribes to manage their own fish and wildlife resources on the Fort Hall Reservation, marking a significant step forward in the recognition of tribal sovereignty in Idaho.