The 300-mile winter haul that saved the American Revolution
In short: In a desperate bid to break the Siege of Boston, a 25-year-old bookseller led a grueling winter expedition. He moved 60 tons of heavy artillery across frozen rivers and through deep swamps—a logistical feat so massive it remains one of the most stupendous feats of the Revolutionary War.
In late 1775, George Washington faced a critical shortage of heavy weaponry, rendering offensive operations against British forces in Boston nearly impossible. The solution lay at Fort Ticonderoga, where a force of 83 men had captured a cache of cannons without a fight. However, the challenge was not just seizing the guns, but moving them. Colonel Henry Knox, a young bookseller with a passion for military matters, was tasked with this 'noble train of artillery.'
The logistics were staggering. Knox organized 59 pieces of equipment—including mortars and howitzers—weighing an estimated 119,000 pounds (about 60 tons). The largest units, the 24-pounders, measured 11 feet long and weighed over 5,000 pounds each. To move them, Knox utilized a diverse fleet of transport: boats, horses, ox-drawn sledges, and sheer manpower.
He navigated poor-quality roads, forests, and swamps across approximately 300 miles (500 km) during the brutal winter of 1775–76. The journey was plagued by setbacks. A gundalow carrying much of the train foundered on Lake George but was successfully bailed out and refloated. To cross the frozen Hudson River, Knox's team even attempted to thicken the ice by pouring water over it—a desperate measure that still resulted in several cannons crashing through into the river. Despite these hazards, the train reached Boston by late January 1776. This movement allowed Washington to establish batteries at Dorchester Heights, forcing a British withdrawal from Boston on March 17, 1776.
While Knox's letters and diaries provide much of the history, significant gaps remain in the documentation of the Massachusetts portion of the route. Modern markers along the Henry Knox Trail are often placed based on historical assumptions about road layouts rather than certain records. Despite these mysteries, the expedition remains a landmark of military logistics, ultimately securing the survival of the nascent American forces.
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