According to INDEXDOTCOM, Arizona is one of the Four Corners states and has a long and varied history. The earliest inhabitants of what is now Arizona were the ancient Hohokam people, who lived in the area from about 300 BC to 1450 AD. They built an extensive irrigation system that supported an agricultural lifestyle. In 1539, Spanish explorers led by Francisco Vázquez de Coronado arrived in Arizona. The Spanish established missions and presidios in the region throughout the 17th century, but their presence was largely limited to the southern part of what is now Arizona. The United States gained control of Arizona following the Mexican-American War (1846-1848). In 1863, Arizona was officially organized as a territory of the United States. During this period, prospectors discovered silver and gold deposits in Arizona which led to a mining boom throughout much of the 19th century. Arizona became an official state in 1912 and has since grown rapidly due to its attractive climate and diverse geography. Today, it is home to over 7 million people who are drawn by its deserts, mountains, forests, canyons, rivers and lakes. Check Agooddir for more about Arizona.