1. On July 18, 1867, Fort Bowie was established in southeastern Arizona. It served as a military outpost during the Apache Wars and is now a National Historic Site.

2. In 1906, the Grand Canyon National Monument was established by President Theodore Roosevelt. The monument later became Grand Canyon National Park, which attracts millions of visitors each year.

3. On July 18, 1921, Flagstaff was hit by a devastating flood caused by heavy rainfall. The flood destroyed homes and businesses and resulted in several deaths.

4. In 1940, Arizona Governor Robert T. Jones signed a bill making the cactus wren the official state bird. The cactus wren is known for its distinctive call and can be found throughout the southwestern United States.

5. On July 18, 1985, 25 people were killed and 267 were injured in a train derailment near Tempe. The accident was caused by a faulty switch and resulted in one of the deadliest train disasters in United States history.