The Day Arizona Became a State
Arizona became a state on February 14, 1912. It was the last of the 48 contiguous states to be invited into the union. In 2005, the governor of Arizona, Janet Napolitano, established a coordinating committee to honor Arizona's centennial in 2012.
How Arizona Became a State
Arizona was declared part of the Territory of New Mexico until southern New Mexico seceded from the Union as the Confederate Territory of Arizona on March 16, 1861
