On June 27, 1775, General George Washington and his Continental Army invaded Canada in an attempt to conquer Quebec. British reinforcements came up the St. Lawrence in May 1776, and the Battle of Trois-Rivières turned into a disaster for the Americans. The army withdrew to Ticonderoga. Although some help was given to the Americans by the locals, Governor Carleton punished American sympathizers, and public support of the American cause came to an end. In 1778, Frederick Haldimand took over for Guy Carleton as governor of Quebec.