1. In 1869, gold was discovered in the Bradshaw Mountains, leading to the establishment of the town of Prescott. This event played a significant role in the economic development of Arizona.

2. In 1911, Arizona became the 48th state admitted to the United States. This followed years of lobbying and political wrangling, as well as a war with Mexico that had stoked fears of instability in the region.

3. In 1939, the Arizona Museum of Art officially opened its doors in Phoenix. The museum houses an extensive collection of contemporary art, including works by Frida Kahlo, Georgia O'Keeffe, and many others.

4. On November 17, 1970, a 6.9 magnitude earthquake struck the region around the town of Parker, causing widespread damage and injuring several people. The quake was one of the strongest ever recorded in Arizona.

5. In 1994, the United States and several other countries signed the GATT (General Agreement on Tariffs and Trade) treaty in Marrakesh, Morocco. Although not directly related to Arizona, the treaty had significant implications for international trade and commerce, including the agricultural sector, which is a key component of Arizona's economy.