1. In 1912, Arizona became the 48th state of the United States. November 4 marked the day of the state's admission into the Union, making it a significant milestone in Arizona's history.

2. November 4, 1929, marked the start of the construction of the Hoover Dam on the Colorado River, which was one of the largest public works projects of its time. The dam created Lake Mead, the largest reservoir in the United States, and it produced hydroelectric power that helped power the Southwest's growing population.

3. In 1952, Arizona Senator Ernest McFarland won re-election, defeating Barry Goldwater. The close election helped McFarland become a key player in the Democratic Party, and he later became the Senate majority leader.

4. On November 4, 1964, Arizona voters approved a constitutional amendment that gave the state the authority to regulate the use of groundwater. This was a crucial step in managing Arizona's scarce water resources and continues to shape the state's approach to water management today.

5. In 2014, Arizona voters passed Proposition 303, which allowed terminally ill patients to access experimental drugs that had not yet been approved by the FDA. The measure was seen as a way to provide hope to those facing life-threatening illnesses and to allow patients access to potentially life-saving treatments.