The American fleet totaled 16 to 18 armed vessels, 24 transports, and around 1,500 troops, vastly outnumbering the British forces at Castine.
The fleet arrived off Bagaduce on July 25 to find Captain Mowat with three armed sloops in the small harbor.
The Americans launched an amphibious assault, but strong winds and tidal currents brought a quick retreat. Saltonstall anchored his ships out of cannon range, and aside from ineffective small land assaults refused to commit troops or ships.
Peleg Wadsworth wrote to his wife, Betsey, on July 31, describing the position of the American ships and forces and the strength of the British and the ineffectiveness of the early actions.
He noted that Americans had suffered more casualties than had the British.