third invasion was stopped with the improbable French victory in the Battle of Carillon, in which 3,600 Frenchmen defeated Abercrombie's force of 18,000 regulars, militia, and Indian allies outside the fort which the French called Carillon and the British called Ticonderoga. Abercrombie saved something from the disaster when he sent John Bradstreet on an expedition that successfully destroyed Fort Frontenac, including caches of supplies destined for New France's western forts and furs destined for Europe. Abercrombie was recalled and replaced by Jeffery Amherst, victor at Louisbourg. The French had generally poor results in 1758 in most theaters of the war. The new foreign minister was the duc de Choiseul, and he decided to focus on an invasion of Britain to draw British resources away from North America and the European mainland. The invasion failed both militarily and politically, as Pitt again planned significant campaigns against New France and sent funds to Britain's mainland ally of Prussia, while the French Navy failed in the 1759 naval battles at Lagos and Quiberon Bay. In one piece of good fortune, some French supply ships did manage to depart France and elude the British blockade of the French coast. 1759–1760 The British proceeded to wage a campaign in the northwest frontier of Canada in an effort to cut off the French frontier forts to the west and south. They captured Ticonderoga and Fort Niagara, and they defeated the French at the Thousand Islands in the summer of 1759. In September 1759, James Wolfe defeated Montcalm in the Battle of the Plains of Abraham which claimed the lives of both commanders. After the battle, the French capitulated the city to the British. In April 1760, François Gaston de Lévis led French forces to launch an attack to retake Quebec. Although he won the Battle of Sainte-Foy, Lévis' subsequent siege of Quebec ended in defeat when British ships arrived to relieve the garrison. After Lévis had retreated he was given another blow when a British naval victory at Restigouche brought the loss of French ships meant to resupply his army. In July Jeffrey Amherst then led British forces numbering around 18,000 men in a three pronged attack on Montreal. After eliminating French positions along the way all three forces met up and surrounded Montreal in September. Many Canadians deserted or surrendered their arms to British forces while the Native allies of the French sought peace and