The Battle of Fort Frontenac took place on August 26–28, 1758 during the Seven Years' War (referred to as the French and Indian War in the United States) between France and Great Britain. The location of the battle was Fort Frontenac, a French fort and trading post which is located at the site of present-day Kingston, Ontario, at the eastern end of Lake Ontario where it drains into the St. Lawrence River. British Lieutenant Colonel John Bradstreet led an army of over 3,000 men, of whom about 150 were regulars and the remainder were provincial militia. The army besieged the 110 people inside the fort and won their surrender two days later, cutting one of the two major communication and supply lines between the major eastern centres of Montreal and Quebec City and France's western territories (the northern route, along the Ottawa River, remained open throughout the war). The British captured goods worth 800,000 livres from the trading post. Background The British military campaigns for the North American theatre of the Seven Years' War in 1758 contained three primary objectives. Two of these objectives, captures of Fort Louisbourg and Fort Duquesne met with success. The third campaign, an expedition involving 16,000 men under the command of General James Abercrombie, was disastrously defeated on July 8, 1758, by a much smaller French force when it attempted the capture of Fort Carillon (known today as Fort Ticonderoga). Following that failure, many of Abercrombie's underlings sought to distance themselves from any responsibility for the disaster. Lieutenant Colonel John Bradstreet renewed an earlier proposal to capture Fort Frontenac, a French fort and trading post on the northern shore of Lake Ontario near where it empties into the St. Lawrence River. Abercrombie, who had first rejected the idea, citing the need for troops to attack Carillon, approved Bradstreet's plan to move up the Mohawk River valley to the site of Fort Oswego (captured and burned by the French in 1756), and then cross the lake to assault Frontenac. The British considered Fort Frontenac to be a strategic threat since it was in a position to command transportation and communications to other French fortifications and outposts along the St. Lawrence – Great Lakes water route and in the Ohio Valley. Although not as important as it once was, the fort was still a base from which the western outposts were supplied. The British reasoned that if