The Congress of the United States made formal declaration of war against Great Britain and its dependencies June 18, 1812. In the month previous General William Hull had been appointed to the command of the northwestern army, intended for the invasion of Canada. This army arrived on the Maumee River on May 30th, and marching northward subsequently crossed over at Detroit. High hopes were entertained of the success of this expedition, and the bitterest disappointment and chagrin were manifested throughout the country when it was learned that Hull had surrendered his entire command to the British General Brock on August 14th. The regiment to which Colonel Scott was assigned was the Second Artillery. Colonel George Izard and he arrived on the Niagara frontier with the companies of Nathan Towson and James Nelson Barker. He was posted at Black Rock for the protection of the navy yard there established. An expedition had been planned by Lieutenant Elliott, of the navy, for the capture or destruction of two armed British brigs which were lying under the guns of Fort Erie. On October 8th Colonel Scott detached Captain Towson and a portion of his company to report to Elliott. On the morning of the 9th the Adams was taken by Elliott and Lieutenant Isaac Roach, and the Caledonia was captured by Captain Towson. In passing down the river the Adams drifted into the British channel and ran aground under the British guns. The enemy endeavored to recapture her, but were successfully resisted by Colonel Scott. This was his first experience under fire, and he was complimented for his skill and gallantry. The Caledonia was afterward a part of Commodore Perry's fleet on Lake Erie. The Adams, having drifted aground, was burned to prevent recapture. The northwestern army at this time consisted of about ten thousand troops. General Henry Dearborn held command near Plattsburg and Greenbush, and was the commanding officer of all the forces on the northern frontier. A portion of his army was camped at Lewistown under the command of General Stephen Van Rensselaer, of New York. General Alexander Smyth was at Buffalo with some fifteen hundred regular troops. Besides these, there were small detachments at Ogdensburg, Sackett's Harbor, and Black Rock. General Van Rensselaer conceived the plan of making a bold and sudden move into Canada, with a view of capturing Jamestown, and there establishing winter quarters. The affair of the capture of the two English brigs with fifty men had roused great enthusiasm, and the country was anxious for some success of arms to alleviate the depression occasioned by Hull's surrender. General Van Rensselaer confided the immediate command of the expedition to his relative, Colonel Solomon Van Rensselaer, an officer of coolness and courage, who, with three hundred militia and three hundred regulars, under Colonel Chrystie, on October 13th began crossing the river.