1. On February 4, 1847, the Mormon Battalion arrived in Tucson, Arizona. The battalion, made up of around 500 Mormon men, was tasked with helping the United States in the Mexican-American War. They traveled over 2,000 miles from Iowa to San Diego and played an important role in securing the Southwest for the United States.

2. In 1912, Arizona became the 48th state admitted to the Union on February 14th. However, on February 4th, Arizona also celebrated its first statehood convention. The convention, held in Phoenix, was attended by delegates from across the territory and helped lay the groundwork for Arizona's future as a state.

3. On February 4, 1933, the USS Arizona was launched in the Brooklyn Navy Yard. The ship would go on to serve in World War II and was famously attacked and sunk by the Japanese at Pearl Harbor on December 7, 1941. Today, the USS Arizona Memorial stands as a reminder of the sacrifice of the ship and its crew.

4. February 4, 1947, marked the first day of the Arizona State Fair's annual rodeo competition. The fair, which began in 1884, is now one of the largest in the country and attracts millions of visitors each year. The rodeo competition remains one of the fair's most popular events.

5. On February 4, 1959, Arizona State University was officially granted university status. The school had been known as Arizona State College since 1945 and underwent significant changes in the following years, including expanding its academic programs and student body. Today, ASU is one of the largest universities in the country with over 100,000 students across its multiple campuses.