Coffee earned its nickname via the military. President Woodrow Wilson’s U.S. Navy Secretary Josephus Daniels banned alcohol on ships in the U.S. Navy from the outset of World War I.
Coffee filled the void left by the outgoing rum and wine. Sailors were not pleased with the change and referred to the replacement as a “Cup of Joseph,” which soon became a Cup o’ Joe.
Coffee even helped win World War II. U.S. troops created one of the world’s most popular coffee beverages, the Caffé Americano, by watering down their Italian espresso shots – which were too strong for their taste palate.