On May 10, 1775, a small band of American militiamen stunned the most powerful military in the world when they fearlessly wrestled Fort Ticonderoga from British control—delivering the first American offensive victory of the Revolutionary War and proving that the forces of liberty could triumph over the mightiest of empires. After the outbreak of the Revolutionary War at the Battles of Lexington and Concord in April, American forces urgently needed to strengthen their firepower to break the British grip on Boston and secure their position in New England.  Answering the call to freedom, the legendary Green Mountain Boys—a militia from the New Hampshire Grants of present-day Vermont—set out on a daring mission to seize Fort Ticonderoga, a vulnerable British outpost in the Colony of New York that commanded a vital waterway and held a massive arsenal of artillery and cannons.…