The Mexican Revolution sends thousands of refugees to California. Mexican farm workers organize unions, are deported, and replaced with workers from the Philippines. Dust storms on the great plains displace thousands, bringing more job seekers to California. Poverty is rampant. World War Two, Songs of the Cities World War Two absorbs men into the armed services.
Women manufacture bombs, tanks, ships and airplanes.
Japanese-Americans are interned in concentration camps, and many volunteer for military duty in Europe. The United States and Mexico create the Bracero program.