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.

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.

[2] 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.

The trek met with minimal opposition from French and Indian raiding parties, but the route to Oswego, which had been virtually unused since 1756, was overgrown, and some of the waterways had silted up, causing heavily laden bateaux to ground in the shallow waters.

[7] Bradstreet's flotilla of bateaux crossed Lake Ontario, landing without opposition about one mile (1.6 km) from Fort Frontenac on August 25.

Since Bradstreet's orders were not to hold the fort but to destroy it, many of the provisions were burned before the army returned to Oswego, using some of the captured French ships to help carry the loot.

The French established Fort de La Présentation (at present-day Ogdensburg, New York) as a base for supply and defense.

Fort Frontenac was again lightly garrisoned in 1759, but was no longer a site of importance in the war, which ended with the fall of Montreal in September 1760.

Noyan returned to France, where he spent some time in the Bastille on charges that he misappropriated public funds, and was eventually fined six livres.