The American invasion of Canada in 1775

When the American Revolution began, some military planners turned their eyes northward towards the province of Quebec, The rationale was that the formerly French province, then in British hands would welcome the Americans, and support them in their revolt. The idea of a fourteenth colony rebelling against British rule was appealing. Ethan Allen's seizure of Fort Ticonderoga opened a river highway into the heart of Quebec. American generals lobbied Congress to authorize an invasion which would gain an ally, threaten the position of the Indians in New England and New York, and secure America's northern boundaries.