Which British officer led the 1758 expedition against Fort Frontenac?

The British officer who led the 1758 expedition against Fort Frontenac was John Bradstreet.

Bradstreet was a British Army officer with extensive experience in North America. He proposed attacking Fort Frontenac because the post supported French communications and supply routes between the St. Lawrence, the Great Lakes, and the Ohio Country. The plan gained approval after the British defeat at Fort Carillon, now Fort Ticonderoga.

Bradstreet assembled a force of regular troops and provincial militia, moved through the Mohawk Valley to the ruins of Fort Oswego, and crossed Lake Ontario. His army reached Fort Frontenac in August 1758 and compelled the small French garrison to surrender after two days of bombardment.

The other names are associated with different campaigns. William Johnson helped lead the 1759 expedition against Fort Niagara, Robert Monckton fought in several Atlantic and Canadian operations, and James Abercrombie commanded the larger British army defeated at Carillon. Bradstreet’s victory restored British confidence after that setback.