This marker commemorates the passage of Henry Knox’s artillery train during the winter of 1775–1776. George Washington’s army had surrounded British-occupied Boston but lacked enough heavy cannon to force a decision. Knox, a twenty-five-year-old Boston bookseller with a strong knowledge of military science, proposed bringing the guns captured at Fort Ticonderoga and Crown Point across New York and Massachusetts. Washington approved the plan in November 1775.

At Lake Champlain, Knox selected fifty-nine pieces, including cannon, mortars, howitzers, and coehorns. Their weight made the expedition a formidable engineering and transportation problem. The guns moved by boat down Lake George and then onto sledges pulled by oxen and horses. Snow could ease the sledges but also block roads; insufficient cold made rivers unsafe. Equipment broke, animals tired, and several guns fell through ice or overturned.

The trail marker identifies one point on the overland route. It does not indicate a battle or necessarily an overnight camp. Its importance lies in the passage of the column and in the local transportation network that made movement possible. Knox depended upon teamsters, animals, taverns, blacksmiths, roads, bridges, and residents willing or required to provide assistance. The achievement belonged to a large support system as well as to its energetic commander.

Knox kept a journal and pressed the expedition forward despite delays. After crossing the Hudson and the Berkshire hills, the train entered Massachusetts and continued toward Cambridge. The artillery reached the American lines by late January. Washington concealed his final plan while equipment and ammunition were prepared.

On the night of March 4–5, Continental troops occupied and fortified Dorchester Heights. Heavy guns placed there commanded Boston and threatened the British fleet. General William Howe planned an assault, but bad weather intervened. Recognizing that the position could not be left unchallenged, Howe evacuated the army and Loyalist refugees on March 17, 1776.

The evacuation was the first great strategic success under Washington’s direct command. It liberated Boston without a destructive bombardment and allowed the Continental Army to move elsewhere. The result depended on artillery transported hundreds of miles through winter conditions.

This roadside monument is one of a series tracing Knox’s route. Together the markers convert a dispersed logistical achievement into a visible historic trail. At this location, visitors encounter no surviving cannon train, but they can understand the landscape as part of a moving operation. The event was not a momentary clash; it was weeks of labor. Each successful mile brought Washington closer to the leverage needed to end the siege and demonstrated that the emerging Continental Army could accomplish a complex mission despite scarce resources.