between 1931 and 1936. It operationalized a schedule of water use set by the Colorado River Compact of 1922 that gave Arizona 19% of the river's water, with 25% to Nevada and the rest to California. World War II Construction of military bases in Arizona was a national priority because of the state's excellent flying weather and clear skies, large amounts of unoccupied land, good railroads, cheap labor, low taxes, and its proximity to California's aviation industry. Arizona was attractive to both the military and private firms and they stayed after the war. Fort Huachuca became one of the largest nearly-all-black Army forts, with quarters for 1,300 officers and 24,000 enlisted soldiers. The 92nd and 93rd Infantry Divisions, composed of African-American troops, trained there. During the war, Mexican-American community organizations were very active in patriotic efforts to support American troops abroad, and made efforts to support the war effort materially and to provide moral support for the American servicemen fighting the war, especially the Mexican-American servicemen from local communities. Some of the community projects were cooperative ventures in which members of both the Mexican-American and Anglo communities participated. Most efforts made in the Mexican-American community represented localized American home front activities that were separate from the activities of the Anglo community. Mexican-American women organized to assist their servicemen and the war effort. An underlying goal of the Spanish-American Mothers and Wives Association was the reinforcement of the woman's role in Spanish-Mexican culture. The organization raised thousands of dollars, wrote letters, and joined in numerous celebrations of their culture and their support for Mexican-American servicemen. Membership reached over 300 during the war and eventually ended its existence in 1976. Heavy government spending during World War II revitalized the Arizona economy, which was still based on copper mining, citrus and cotton crops and cattle ranching, with a growing tourist business. Military installations peppered the state, such as Davis-Monthan Field in Tucson, the main training center for air force bomber pilots. Two relocation camps opened for Japanese and Japanese Americans brought in from the West Coast. After 1945 After World War II the population grew rapidly, increasing sevenfold between 1950 and 2000, from 700,000 to over 5 million. Most of the growth was in the Phoenix area, with Tucson a distant second. Urban growth doomed the state's citrus industry, as the groves were turned into housing developments. The cost of water made growing