The American Revolutionary War, which began in April 1775 with the Battles of Lexington and Concord, widened in September 1775 when the Continental Army embarked on an invasion of the British Province of Quebec. The province was viewed by the Second Continental Congress as a potential avenue for British forces to attack and divide the rebellious colonies and was at the time lightly defended. The invasion reached a peak on December 31, 1775, when the Battle of Quebec ended in disaster for the Americans. In the spring of 1776, 10,000 British and German troops arrived in Quebec, and General Guy Carleton, the provincial governor, drove the Continental Army out of Quebec and back to Fort Ticonderoga.