National Prohibition in the United States of America was brought about by the ratification of the Eighteenth Amendment, which had been passed by Congress on December 18, 1917 and ratified on January 16, 1919. National Prohibition went into effect one year later, on January 16, 1920.
The Eighteenth Amendment was repealed by the Twenty-first Amendment which took effect on December 5, 1933.
Source:
Pegram, Thomas R. "National Prohibition." Alcohol and Temperance in Modern History: An International Encyclopedia. Santa Barbara, CA: ABC-CLIO, 2003.
Researched by Regina G. Feeney, January 3, 2020.
Near beer was beer that contained an alcohol content of less than one half of one percent. It was legal during Prohibition.
Source:
Funderburg, J. Anne. Bootleggers and Beer Barons of the Prohibition Era. Jefferson, NC: McFarland & Company, Inc., 2014.
Researched by Regina G. Feeney, January 3, 2020.