Prohibition was a nationwide ban on the production, importation, transportation, and sale of alcoholic beverages in the United States, which lasted from 1920 to 1933. This period was established by the 18th Amendment to the U.S. Constitution and aimed to reduce crime and corruption, improve health, and strengthen families. However, Prohibition led to unintended consequences, including the rise of illegal activities and organized crime, as people sought ways to obtain alcohol. Speakeasies, or secret bars, became popular, and the government struggled to enforce the ban. Ultimately, Prohibition was repealed by the 21st Amendment in 1933.