Beer in the United States
On January 16, 1919, the Eighteenth Amendment to the United States Constitution was enacted into law, creating the Prohibition era, wherein the production, sale and transportation of alcoholic beverages was made illegal. All legal American brewing came to a halt when prohibition was imposed, though the earlier temperance movement had already reduced the number of breweries significantly. Only a few breweries, mainly the largest, were able to stay in business by manufacturing near beer, malt syrup, or other non-alcohol grain products, in addition to soft drinks such as colas and root beers. Production and shipping of alcohol was largely confined to illegal operations that could deliver compact distilled beverages—smuggled rum and domestic moonshine—more efficiently and reliably than bulkier products such as beer.
Repeal of Prohibition in the United States
The Cullen–Harrison Act, signed by President Franklin D. Roosevelt on March 22, 1933, authorized the sale of 3.2 percent beer (thought to be too low an alcohol concentration to be intoxicating) and wine, which allowed the first legal beer sales since the beginning of Prohibition on January 16, 1920. In 1933 state conventions ratified the Twenty-first Amendment, which repealed Prohibition. The Amendment was fully ratified on December 5, 1933. Federal laws enforcing Prohibition were then repealed.