Arizona was the 48th state in the USA. It became a state on February 14, 1912. State Capital is Phoenix. Nickname is the Grand Canyon State. The official state flag has 13 yellow and red rays that represent both the Sun's rays and the original 13 colonies of the United States of America. - The colors red and yellow are used because they were the colors of the flag of the Spanish conquistadors led by Francisco Vasquez de Coronado, who entered Arizona in 1540 (looking for the legendary Seven Cities of Cibola). - The copper-colored star in the middle represents copper mining, since Arizona produces more copper than any other state in the USA.