In response to continued British interference with American shipping (including the practice of impressment of American sailors into the British Navy), and to British aid to American Indians in the Old Northwest, the Twelfth Congress—led by Southern and Western Jeffersonians—declared war on Britain in 1812. Westerners and Southerners were the most ardent supporters of the war, given their concerns about defending national honor and expanding western settlements, and having access to world markets for their agricultural exports. New England was making a fine profit and its Federalists opposed the war, almost to the point of secession. The Federalist reputation collapsed in the triumphalism of 1815 and the party no longer played a national role.