USA Interwar Propaganda Collection: In 1920, the manufacture, sale, import and export of alcohol was prohibited by the Eighteenth Amendment to the United States Constitution. Well-organized criminal gangs exploded in numbers, finances, power, and influence on city politics.
The Wall Street Crash of 1929 and the ensuing Great Depression led to government efforts to restart the economy and help its victims.
By 1939, isolationist sentiment in America had ebbed, and after the stunning fall of France in 1940 to Nazi Germany, the United States began rearming itself and sent a large stream of money and military supplies to Britain and the Soviet Union. (Wikipedia)