Prohibition
Prohibition in the United States focused on the manufacture, transportation, and sale of alcoholic beverages; however, exceptions were made for medicinal and religious uses. Alcohol consumption was never illegal under federal law. Nationwide Prohibition did not begin in the United States until January 1920, when the Eighteenth Amendment to the U.S. Constitution went into effect. The 18th amendment was ratified in 1919, and was repealed in December 1933 with the ratification of the Twenty-first Amendment.
Napa County wine
As the turn of the twentieth century approached, a series of setbacks commenced that devastated the Napa County wine industry for decades. A phylloxera outbreak decimated the wine grape crop, and this was followed by Prohibition in 1918, which made the production and transportation of alcohol illegal in the United States. In 1933, when Prohibition was repealed, the United States was in the midst of the Great Depression, and as a result the Napa County wine industry did not fully recover until 1960’s.