<P> The Baltimore riots were the height of violent backlash during the war, whose popularity dropped through 1813 and 1814 . However, after the war, when the Hartford Convention's proceedings became public just after a peace treaty was signed with Britain, there was a longer - term backlash against the Federalist Party, which became associated with secession and treason . The party never regained national predominance, fielding its last Presidential candidate in 1816 and fading away entirely by the end of the 1820s . </P> <Table> <Tr> <Td> </Td> <Td> This article possibly contains original research . Please improve it by verifying the claims made and adding inline citations . Statements consisting only of original research should be removed . (September 2007) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article possibly contains original research . Please improve it by verifying the claims made and adding inline citations . Statements consisting only of original research should be removed . (September 2007) (Learn how and when to remove this template message) </Td> </Tr> <P> The War of 1812 was the first war declared by the United States, as the U.S., and so some historians see it as the first to develop widespread antiwar sentiment . (However, there was also anti-war sentiment during the Quasi-War and the First Barbary War .) There is little direct continuity between the opponents of the War of 1812 and later antiwar movements, as the Federalist party's objections weren't based on pacifism, and as this same "antiwar" party effectually disappeared soon after peace was concluded . However, the war did result in the formation of the New York Peace Society in 1815 in an effort to prevent similar future wars . The New York Peace Society was the first peace organization in the United States, lasting in various incarnations until 1940 . A number of other peace societies soon formed, including eventually the American Peace Society, a national organization which exists to the present day . The American Peace Society was formed in 1828 by the merger of the Massachusetts Peace Society and similar societies in New York, Maine, and New Hampshire . </P>

Strongest support for the war of 1812 came from new england