What did companies like Jack Daniels, Jim Beam, Busch and other do during Prohibition?................
Winston Churchill wrote a lot about that in a collection of magazine length articles called “The Great Republic”. It’s funny as hell.
Basically there were all kind of loopholes.
Beer makers made malt beverages and near beer. Winston talked about how there were many manufacturing accidents that caused the near beer to spike in alcohol content.
Wine makers were allowed to make sacramental wine. He toured one vineyard in California and talked about his awe of the deeply pious American people and the amounts of wine needed to sustain their worship.
Then also, when prohibition passed, one was allowed to keep and use the liquor you had in possession at that time.
He commented how the average American must have kept vast stocks of whiskey on hand because 8 years into prohibition the were still well supplied and not running low.
A very good book about his travels in America. Lots of fun.
Also that was the origin of “Medicinal Whiskey”. The distillers got to make whiskey strictly for use by doctors.
Ken Burns has a very good series about prohibition.