Prohibition in the United States to other issues, such as Mormon polygamy and the temperance movement. On November 18, 1918, prior to ratification of the Eighteenth Amendment, the U.S. Congress passed the temporary Wartime Prohibition Act, which banned the sale of alcoholic beverages having an alcohol content of greater than 1.28%. (This act, which had been intended to save grain for the war effort, was passed after the armistice ending World War I was signed on November 11, 1918.) The Wartime Prohibition Act took effect June 30, 1919, with July 1, 1919 becoming known as the "Thirsty-First". The U.S. Senate proposed the Eighteenth Amendment on
Twenty-first Amendment to the United States Constitution Twenty-first Amendment to the United States Constitution The Twenty-first Amendment (Amendment XXI) to the United States Constitution repealed the Eighteenth Amendment to the United States Constitution, which had mandated nationwide Prohibition on alcohol. The Twenty-first Amendment was proposed by Congress on February 20, 1933, and was ratified by the requisite number of states on December 5, 1933. It is unique among the 27 amendments of the U.S. Constitution for being the only one to repeal a prior amendment, as well as being the only amendment to have been ratified by state ratifying conventions. The Eighteenth Amendment was ratified on January