sentences:  Control of the upper Hudson would enable the British to link their forces in Quebec with those in New York, recently captured in the New York campaign by Major General William Howe.This strategy would separate the American colonies of New England from those farther south and potentially quash the rebellion.Lake Champlain, a long and relatively narrow lake formed by the action of glaciers during the last ice age, separates the Green Mountains of Vermont from the Adirondack Mountains of New York.