<Ul> <Li> The Hartford Convention of delegates from Massachusetts, Connecticut and Rhode Island and others discusses New England's opposition to the War of 1812 and trade embargoes . The convention report says that New England had a "duty" to assert its authority over unconstitutional infringements on its sovereignty, a position similar to the later nullification theory put forward by South Carolina . The war soon ends and the convention and the Federalist Party which had supported it fall out of favor, especially in the South although leaders in Southern states later would adopt the States' rights concept for their own purposes . </Li> </Ul> <Li> The Hartford Convention of delegates from Massachusetts, Connecticut and Rhode Island and others discusses New England's opposition to the War of 1812 and trade embargoes . The convention report says that New England had a "duty" to assert its authority over unconstitutional infringements on its sovereignty, a position similar to the later nullification theory put forward by South Carolina . The war soon ends and the convention and the Federalist Party which had supported it fall out of favor, especially in the South although leaders in Southern states later would adopt the States' rights concept for their own purposes . </Li> <Tr> <Td> 1816 </Td> <Td> <Ul> <Li> Henry Clay, James Monroe, Bushrod Washington, Robert Finley, Samuel John Mills Jr. and others organize the American Colonization Society to send freed slaves to Liberia . The Society funds the migration of about 10,000 free blacks to return to Africa . </Li> <Li> In Philadelphia, the African Methodist Episcopal Church, the first black denomination in the United States, is established by Richard Allen . </Li> <Li> Indiana joins the United States as a free state . The 1816 state constitution freed all the slaves there . </Li> </Ul> </Td> </Tr> <Ul> <Li> Henry Clay, James Monroe, Bushrod Washington, Robert Finley, Samuel John Mills Jr. and others organize the American Colonization Society to send freed slaves to Liberia . The Society funds the migration of about 10,000 free blacks to return to Africa . </Li> <Li> In Philadelphia, the African Methodist Episcopal Church, the first black denomination in the United States, is established by Richard Allen . </Li> <Li> Indiana joins the United States as a free state . The 1816 state constitution freed all the slaves there . </Li> </Ul>

What are two events that led to the american revolution