What Exactly Does The 18th Amendment Prohibit?

What Exactly Does The 18th Amendment Prohibit? 18th Amendment to the U.S. Constitution: Primary Documents in American History. Ratified on January 16, 1919, the 18th Amendment prohibited the “manufacture, sale, or transportation of intoxicating liquors”. What did the 18th Amendment ban or prohibit? On January 16, 1919, the requisite number of states ratified the 18th