<P> In November 1775 , Washington sent the 25 - year - old bookseller - turned - soldier Henry Knox to bring to Boston the heavy artillery that had been captured at Fort Ticonderoga . In a technically complex and demanding operation , Knox brought many cannons to the Boston area by January 1776 . In March 1776 , these artillery fortified Dorchester Heights ( which overlooked Boston and its harbor ) , thereby threatening the British supply lifeline . The British commander William Howe saw the British position as indefensible and withdrew the British forces in Boston to the British stronghold at Halifax , Nova Scotia , on March 17 ( celebrated today as Evacuation Day ) . </P>
<P> In November 1775 , Washington sent the 25 - year - old bookseller - turned - soldier Henry Knox to bring to Boston the heavy artillery that had been captured at Fort Ticonderoga . In a technically complex and demanding operation , Knox brought many cannons to the Boston area by January 1776 . In March 1776 , these artillery fortified Dorchester Heights ( which overlooked Boston and its harbor ) , thereby threatening the British supply lifeline . The British commander William Howe saw the British position as indefensible and withdrew the British forces in Boston to the British stronghold at Halifax , Nova Scotia , on March 17 ( celebrated today as Evacuation Day ) . </P>
what fort supplied the cannon used to relieve the siege of boston
what fort supplied the cannon used to relieve the siege of boston
Fort Ticonderoga
Fort Ticonderoga