At timestamp 00:18:40 in the first episode: "The Duke family’d been in the whisky business 50 years before the Declaration of Independence. They fought everybody from the British to the Confederacy to the US Government to stay in it, until last year when Bo and Luke got caught on a whisky run. So Jesse swallowed a lifetime of pride and signed a treaty with the US Government to stop making whisky if Bo and Luke could get probation. Y’see, he loved them boys better than life itself. But, sometimes, they really made him wonder why."