The document summarizes key events and developments in California's history from 1920-1963. It discusses how the state established critical infrastructure like dams, aqueducts and reservoirs during this period to support its growing population. It also covers the impact of the Great Depression, including public works programs, as well as labor issues. Additionally, it outlines California's connection to the military and role in World War 2, including the internment of Japanese Americans and massive population growth in the postwar years.