...t later settled in Fairfax county, where he recruited the Fairfax light-horse which he led in the War of 1812. He was acting Secretary of War in 1815-18; and was then sent on a perilous mission to Galveston Island , where General Lallemande, the chief of artillery in Napoleon's army, had founded a colony with 600 armed settlers, whom he persuaded to give up their undertaking and submit to the United States gove...