Did Americans Capture Guns That Drove the British from Boston in 1776?

No. The Continental Army forced the British evacuation of Boston (March 1776) by fortifying Dorchester Heights overnight with artillery dragged from Fort Ticonderoga (captured May 1775 by Ethan Allen/Benedict Arnold). The guns were captured—but at Ticonderoga, NY, not near Boston. Washington's artillery on the heights made the harbor and city untenable; Howe withdrew without a fight. The "noble train of artillery" (Henry Knox's winter haul) is the famous capture, not a Boston seizure.