Lincoln Clark Andrews was a brigadier general in the United States Army during World War I and Assistant Secretary of the Treasury starting in 1925. As Assistant Secretary of the Treasury, he was in charge of Prohibition enforcement. Time magazine called his forces the Prohibition Army.

Isidor "Izzy" Einstein (1880–1938) and Moe W. Smith (1887–1960) were United States federal police officers, agents of the U.S. Prohibition Unit, who achieved the most arrests and convictions during the first years of the alcohol prohibition era (1920–1925). They were known nationally for successfully shutting down illegal speakeasies and for using disguises in their work.