The allied army may be estimated, including militia, at sixteen thousand men. In the course of this siege, they lost, in killed and wounded, about three hundred. The treaty was opened on the eleventh day after the ground was broken by the besiegers, and the capitulation was signed on the thirteenth. The whole army merited great approbation; but, from the nature of the service, the artillerists and engineers were enabled to distinguish themselves particularly. Generals du Portail and Knox were each promoted to the rank of Major General; and Colonel Govion, and Captain Rochfontaine, of the corps of engineers, were each advanced a grade by brevet. In addition to the officers belonging to those departments, Generals Lincoln, De Lafayette, and Steuben, were particularly mentioned by the Commander-in-chief, in his orders issued the day after the capitulation; and terms of peculiar warmth were applied to Governor Nelson, who continued in the field during the whole siege, at the head of the militia of Virginia; and also exerted himself, in a particular manner, to furnish the army with those supplies which the country afforded. The highest acknowledgments were made to the Count de Rochambeau; and several other French officers were named with distinction. So many disasters had attended the former efforts of the United States to avail themselves of the succours occasionally afforded by France, that an opinion not very favourable to the alliance appears to have gained some ground in the country, and to have insinuated itself into the army. The Commander-in-chief seized this occasion to discountenance a course of thinking from which he had always feared pernicious consequences, and displayed the great value of the aids lately received, in language highly flattering to the French monarch, as well as to the land and naval forces of that nation. Knowing the influence which the loss of the army in Virginia must have on the war, Sir Henry Clinton determined to hazard much for its preservation. About seven thousand of his best troops sailed for the Chesapeake, under convoy of a fleet augmented to twenty-five ships of the line. This armament left the Hook the day on which the capitulation was signed at Yorktown, and appeared off the capes of Virginia on the 24th of October. Unquestionable intelligence being there received that Lord Cornwallis had surrendered, the British general returned to New York.