What U.S. policy had just been repealed when Peaky Blinders series 6 begins?

What U.S. policy had just been repealed when Peaky Blinders series 6 begins? Prohibition had just been repealed.

The sixth series opens on 5 December 1933, placing its opening events at the moment the United States ended national alcohol prohibition. The policy had been established by the Eighteenth Amendment in 1919 and enforced through the Volstead Act from 1920.

Repeal came through the Twenty-first Amendment, ratified on 5 December 1933. It reversed the Eighteenth Amendment and returned alcohol regulation largely to the states. This date gives the season an especially precise historical starting point.

A common mix-up is confusing prohibition with the New Deal. Franklin D. Roosevelt's New Deal began in 1933, but it was a broad program of economic relief and reform, not the policy being repealed in the episode's opening setting. The repeal of prohibition also fits Peaky Blinders' recurring interest in American liquor, organised crime and transatlantic business.