1. In 1864, Arizona was officially recognized as a territory of the United States. This was a significant moment in Arizona history, as it paved the way for eventual statehood in 1912.

2. In 1890, the first train arrived in Phoenix, carrying passengers and goods from Tucson. This event marked the beginning of a new era for the city, as it opened up new opportunities for trade and commerce.

3. In 1927, Arizona State University was founded as Arizona State Teacher's College. The school has since grown into one of the largest universities in the country, with over 100,000 students enrolled in its various programs.

4. In 1947, the breakaway Republic of Alta California declared war on Arizona, prompting the governor to call up the National Guard to defend the state. The conflict was resolved peacefully, however, with both sides agreeing to a ceasefire and negotiations.

5. In 1980, the Arizona Cardinals played their first game in Phoenix, having moved from St. Louis earlier in the year. The team has had a rocky history in the state, but remains a beloved institution for many Arizona sports fans.