1. Pueblo Revolt Day: On October 15, 1680, Native American tribes, led by Pueblo leader Popé, launched a revolt against Spanish colonizers in New Mexico. The revolt succeeded in driving the Spanish out of the region for 12 years.

2. New Mexico Becomes a State: On October 15, 1912, New Mexico officially became the 47th state of the United States. It was the first state to have a Hispanic majority population.

3. Taos Revolt: On October 15, 1847, New Mexicans revolted against the United States occupation of their territory in what is now known as the Taos Revolt. The revolt was led by former Mexican governor of New Mexico, Juan Bautista Vigil y Alarid.

4. First Atomic Bomb Test: On October 15, 1945, US Army officials conducted the first atomic bomb test at the Alamogordo bombing range in southern New Mexico. The test was a precursor to the atomic bombs that were dropped on Hiroshima and Nagasaki.

5. Roswell Incident Report: On October 15, 1979, the US Air Force released a report on the Roswell Incident, which had occurred in 1947. The report stated that the incident was most likely a crash of a weather balloon, but conspiracy theories continue to persist about a UFO crash and government cover-up.