Battle of Valcour Island
11–13 October 1776, Lake Champlain, between Valcour Island and the New York shore
British victory, but too late in the year to take Ticonderoga
The British meant to come down Lake Champlain from Canada and cut New England off from the other colonies. Benedict Arnold built a fleet of gondolas and galleys on the lake and anchored it in the channel behind Valcour Island, where the British, carried south by the wind, had to beat back up to reach him. His fleet was badly beaten in an afternoon, but slipped past the British in the fog that night. Over the next two days most of it was caught or burned. The British had spent the summer building their own fleet, though, and with winter coming they went back to Canada. When they came again in 1777 the delay helped bring about the surrender at Saratoga.
Read more on WikipediaRoyal Navy
33 ships, 1 lost
Continental Navy and state navies
15 ships, 11 lost
Map
Arnold's flight down Lake Champlain 11–13 October 1776