Under their new commander, the French at first achieved a number of startling victories over the British, first at Fort William Henry to the south of Lake Champlain. The following year saw an even greater victory when the British army—numbering about 15,000 under Major General James Abercrombie—was defeated in its attack on a French fortification at the Carillon. In June 1758, a British force of 13,000 regulars under Major General Jeffrey Amherst, with James Wolfe as one of his brigadiers, landed and permanently captured the Fortress of Louisbourg.