St. Clair abandons Ticonderoga overnight; the garrison slips out without firing a shot
Fort Ticonderoga was supposed to be unbreakable, the fortress Ethan Allen had seized in 1775 and Congress had counted on ever since. Starting July 2, 1777, British General John Burgoyne's engineers began quietly hauling cannon up Mount Defiance, the high ground overlooking the fort, and by July 5 General Arthur St. Clair concluded he had no position left to defend. St. Clair withdrew his garrison overnight without firing a shot, leaving behind invalids, cattle, and the fort's heaviest guns. News of the retreat reached the colonies as something close to panic.
The uncontested loss of a fort Americans believed impregnable forced Congress to confront how badly it had misjudged its own defenses, and cost Schuyler and St. Clair their commands even after courts martial cleared them. Horatio Gates took over the Northern Department as a direct result, the same Gates who would accept Burgoyne's surrender at Saratoga three months later.
QWhat did the retreating Americans leave scattered behind them at Ticonderoga?
The withdrawal happened fast enough that St. Clair's men left real assets on the table: four invalid soldiers unable to march, the fort's largest cannon (too heavy to move quickly), tents, and a herd of cattle. A small detachment posted at the pontoon bridge with loaded cannon was supposed to cover the retreat, but by the time British troops arrived, those men were drunk and offered no resistance. The British occupied the forts the next morning without firing a shot, finding four invalids, the fort's largest cannons, tents, and cattle left behind by the retreating Americans.
QHow did colonists explain a fort falling without a single shot fired?
Absent a battle to explain the loss, rumor filled the gap. Whispers spread through the colonies that Arthur St. Clair and Philip Schuyler had been bribed by the British to hand over the fort without resistance, a theory with no evidence behind it but plenty of takers among a public that could not otherwise explain how an impregnable position simply emptied overnight. Both generals eventually faced courts martial and were cleared of any wrongdoing, but by then Congress had already stripped them of command and handed the Northern Department to Horatio Gates.
QWhy didn't anyone reinforce a fort everyone expected to be attacked?
American commanders had real warning. By March 1777, generals in the Northern Department believed a British push down the Hudson corridor toward Ticonderoga was likely. Yet the garrison went into summer under-strength and the surrounding works unimproved, a gap between suspicion and preparation that Burgoyne exploited completely. His engineers spent days quietly hauling artillery up Mount Defiance, the overlooking peak nobody had thought worth fortifying, precisely because the Americans had judged the climb too difficult for cannon to matter.
