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 The 18th amendment was ratified in 1919, and was repealed in December 1933 with the ratification of the Twenty-first Amendment.
American wine
Following the repeal of Prohibition in 1933, operators tried to revive the American wine-making industry, which was nearly ended. Many talented wine-makers had died, vineyards had been neglected or replanted with table grapes, and Prohibition had changed Americans' taste in wines. During the Great Depression, consumers demanded cheap "jug wine" (so-called dago red) and sweet, fortified (high alcohol) wine. Before Prohibition, dry table wines outsold sweet wines by three to one, but afterward, the ratio of demand changed dramatically. As a result, by 1935, 81% of California's production was sweet wines. For decades, wine production was low and limited.