1. On January 19, 1863, the Battle of Bear River occurred, which was the largest massacre of Native Americans in U.S. history. The U.S. Army attacked a peaceful Shoshone camp, resulting in the deaths of over 200 men, women, and children.

2. January 19, 1915, saw the first issue of the Prescott Evening Courier, which became one of the most prominent newspapers in Arizona.

3. In 1920, on January 19, Arizona's ratification of the 19th Amendment was celebrated. This amendment granted women the right to vote.

4. On January 19, 1935, the Tumacácori National Monument was established. This monument preserves the ruins of three Spanish colonial missions and is located in Santa Cruz County, Arizona.

5. The Grand Canyon National Park was created on January 19, 1910. The park covers over 1.2 million acres of land in northern Arizona and is one of the most visited national parks in the United States.