Before he became a Revolutionary War general, Henry Knox was just a Boston bookseller with a passion for military strategy. But when war broke out, his knowledge and determination proved invaluable. In this episode of Secret Heroes, we uncover the daring expedition that made him legendary—hauling 60 tons of artillery across frozen rivers and snow-covered mountains to break the British siege of Boston. Hosted by Simplecast, an AdsWizz company. See https://pcm.adswizz.com

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