During the American Revolution, Chimney Point's fate was closely tied to that of Crown Point. A small British garrison at Crown Point was captured by Americans under Captain Seth Warner on May 11, 1775. For nearly a year-and-a-half afterwards, the narrows was an important base for the American army and for their vessels of war on the lake. Headquarters was on the west side of the lake, but Chimney Point was occupied as well. During the American retreat from Canada in June and early July 1776, sick men were cared for on both sides of the lake.