Answer:
"In 1920 the 18th Amendment was ratified, prohibiting the manufacture, sale, and transportation of intoxicating beverages within the United States. U.S. Marshals were the principal enforcing agents of the Prohibition laws until the Treasury Department created the Bureau of Prohibition in 1927."
Step-by-step explanation:
Before Prohibition, criminal gangs were local menaces, running protection rackets on neighborhood businesses and dabbling in vice entrepreneurship. But the overwhelming business opportunity of illegal booze changed everything. For one thing, sourcing and distributing alcohol is an interstate and even international enterprise. Mobsters couldn’t work in isolation if they wanted to keep the liquor flowing and maximize profits."