Bouquet was unfortunately fired with ambition to reduce the hostile stronghold before the arrival of his chief, and accordingly he detached Major Grant and 800 Highlanders to reconnoiter the works of Fort du Quesne. The major, probably with a similar ambition to that of his chief, endeavored to induce the French to give battle, and drew up his men on a neighboring height, beating a march as a challenge. The combat was accepted; the garrison sallied out, and, after a very severe action, routed the Highlanders with loss, and took 300 prisoners, including the commander. The broken remnant of Grant's force fell back in great disorder upon their comrades at Loyal Hanning.[144] Cautioned, but not dispirited, by this untoward occurrence, Forbes advanced with his whole army as rapidly as the rugged country and unfavorable weather would permit, although so debilitated from illness that he was obliged to be borne on a litter. Several parties of French and Indians endeavored to impede his march, but were always repulsed; once, however, in a night attack, some loss and confusion were occasioned by the Highlanders and the Virginian Provincials firing upon each other through mistake. The French were not sufficiently elated by their victory over Grant to venture any serious opposition to Forbes's advance, and the loss of Fort Frontenac, from whence they had been expecting a supply of provisions and warlike stores, rendered successful resistance hopeless: M. de Lignières, their leader, therefore dismantled and abandoned the celebrated fort, and dropped down the stream of the Ohio to the friendly settlements on the Mississippi. The following day, the 25th of November, the British took possession of the deserted stronghold, and at once proceeded to put it in repair. Under the new owners, Pittsburg[145] was substituted for the former name of disastrous memory--Fort du Quesne.[146] This advantage was of considerable importance to the British; the respect for their power among the Indians, which recent disasters in that country had much shaken, was fully restored, and most of the Western native tribes sent to offer aid, or, at least, neutrality. Brigadier-general Forbes lived but a brief space to enjoy the credit gained by this success; his naturally weak constitution was broken by the hardships of the expedition, and he died soon afterward at Philadelphia, in honor, and regretted by all who knew him.