Final answer:
The long-term impact of Madison and Jackson's heroism in the War of 1812 was that they led the country to greater prosperity, solidified its independence from Britain, and paved the way for westward expansion.
Step-by-step explanation:
The long-term impact of Madison and Jackson's heroism in the War of 1812 was that they led the country to greater prosperity.
The war helped the United States gain international respect and launch the political career of Andrew Jackson, who emerged as a national hero after the Battle of New Orleans. This victory ensured the future of American settlement and commerce in the Mississippi River Valley, leading to economic growth and the industrialization of New England.
Overall, the War of 1812 marked a turning point for the United States as it solidified its independence from Britain and paved the way for westward expansion.