1. On August 19, 1913, the Phoenix Union High School opened its doors to students for the first time. The school, now known as Phoenix Union High School District, is one of the largest high school districts in Arizona and serves over 27,000 students.

2. In 1934, on August 19, a group of federal officers led by Morrie Arnovich raided the hideout of notorious gangster John Dillinger in Tucson, Arizona. Although Dillinger had already fled the scene, the officers were able to seize numerous weapons, ammunition, and other materials used by the gang.

3. August 19, 1980, marked the beginning of a four-day strike by copper miners in the town of Morenci, Arizona. The strike was ignited by a wage dispute between the workers and their employer Phelps Dodge Corporation, and it resulted in numerous arrests, injuries, and the temporary closure of the Morenci mine.

4. On August 19, 1994, the city of Winslow, Arizona, held a ribbon-cutting ceremony to celebrate the completion of renovations to the historic La Posada Hotel. The hotel, which first opened in 1930, was designed by renowned architect Mary Colter and has served as a popular tourist destination for many years.

5. The Arizona Diamondbacks played their first home game on August 19, 1998. The team hosted the Colorado Rockies at their brand new stadium, Bank One Ballpark, which would later be renamed Chase Field. The Diamondbacks ultimately went on to win the game 9-2, marking a historic moment for baseball fans in Arizona.