1. 1866: The Idaho Territory is formed - On March 29, 1866, President Andrew Johnson signed a bill that created the Idaho Territory. This new territory included what is now Idaho, Montana, and Wyoming.

2. 1910: Idaho National Forest is established - On March 29, 1910, President William Howard Taft established the Idaho National Forest. Today, the forest covers over 2.4 million acres in central Idaho and is a popular destination for outdoor recreation.

3. 1935: First airplane lands at Boise Airport - On March 29, 1935, the first airplane landed at the newly constructed Boise Airport. The airport has since become a major transportation hub for the region, serving over 3 million passengers annually.

4. 1957: Atomic power plant opens in Idaho - On March 29, 1957, the Experimental Breeder Reactor I (EBR-I) near Arco, Idaho became the first nuclear power plant to produce electricity from atomic energy. The facility is now a National Historic Landmark and a popular tourist attraction.

5. 1999: Idaho wolf reintroduction program begins - On March 29, 1999, the first 14 gray wolves were released into Yellowstone National Park and central Idaho as part of a wolf reintroduction program. This program has helped to restore the wolf population in the area and has become a controversial issue among residents and conservation groups.