The St. Lawrence River is one of the largest rivers in North America. The river spans 744 miles from the St. Lawrence Bay to the Great Lakes.
The St. Lawrence River was the "key to the continent" of North America. Due to the challenging landscape throughout the Northeast, the river facilitated the shipment of goods and people.
Control of the St. Lawrence River allowed those in control to transport essential items throughout the continent during the war. Whoever controlled the river had a major advantage over those forced to trek through the wilderness.