In warfare, salt was almost as much a unum necessarium as gunpowder. Without the preservative, armies and navies could not stockpile meat and fish. Two bushels of salt—more than a hundred pounds—were needed to cure a thousand pounds of pork. Beef required even more. Salt also was used to tan leather, fix the dyes in military uniforms, churn butter, and supplement livestock feed. Before the war, Americans had imported 1.5 million bushels annually, half from the West Indies and half from Britain or southern Europe. The British trade embargo strangled two-thirds of those imports. Profiteers and
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