Arizona were using Arizona as a base to raid the nearby Mexican settlements, as part of their wars against Mexico. Arizona became a U.S. state on February 14, 1912. Arizona was the 48th state admitted to the U.S. and the last of the contiguous states to be admitted. Cotton farming and copper mining, two of Arizona's most important statewide industries, suffered heavily during the Great Depression. But during the 1920s and even the 1930s, tourism began to develop as the important Arizonan industry it is today. Dude ranches, such as the K L Bar and Remuda in Wickenburg, along with the
Admission to the Union Admission to the Union The Admission to the Union Clause of the United States Constitution, often called the New States Clause, found at Article IV, Section 3, , authorizes the Congress to admit new states into the United States beyond the thirteen already in existence at the time the Constitution went into effect. The Constitution went into effect on June 21, 1788, after ratification by 9 of the 13 states, and the federal government began operations under it on March 4, 1789. Since then, 37 additional states have been admitted into the Union. Each new state has been admitted on