Point au Fer projects into Lake Champlain near the present international boundary, commanding a water corridor long used for travel between Canada and the Hudson Valley. British forces recognized the position’s value before the Revolution and established a garrison known as the White House in 1774. The site’s military importance came from geography: troops and supplies moving along the lake passed a narrow observation point where a small force could monitor traffic and support wider operations.

American forces took control after the outbreak of war in 1775. In June 1776, Major General John Sullivan strengthened the position with entrenchments and a wooden stockade equipped with cannon. Notable travelers connected to the failed American effort in Canada passed through the area, including Benjamin Franklin and Charles Carroll on their diplomatic mission and military figures such as Benedict Arnold and Ethan Allen. Point au Fer thus served as a fortified way station within a much larger northern campaign.

American control did not last. After the Battle of Valcour Island in October 1776, the Continental naval force on Lake Champlain was destroyed or scattered, and the strategic initiative returned to Britain. The fort again came under British control. Although Valcour was a tactical defeat, Arnold’s resistance delayed the British advance and helped prevent a full invasion from Canada before winter, buying time for the Americans to prepare defenses farther south.

In 1777, part of Lieutenant General John Burgoyne’s army camped at Point au Fer while moving south from Canada. The expedition aimed to seize the Hudson corridor and isolate New England, but it stalled and surrendered at Saratoga. Point au Fer’s role was logistical rather than decisive: it helped stage movement along the lake at the start of a campaign whose outcome encouraged France to enter the war as an American ally.

The marker layers the Revolution onto an older imperial military landscape that also included the French and Indian War. Surviving terrain and archaeological traces are more important than any intact Revolutionary fortification. The site changed hands because neither side could ignore Lake Champlain. Its history demonstrates that forts were parts of transportation and supply systems, not isolated strongholds, and that control of northern waterways shaped strategy from the invasion of Canada through Burgoyne’s march toward Saratoga.

The nearby international boundary did not exist in its modern settled form during the Revolution. Point au Fer occupied a contested imperial borderland where jurisdiction followed military power more than a clearly surveyed line. That uncertainty helps explain repeated occupation and the continuing strategic attention paid to the point.