2 Mar 1819: Missouri Compromise,Congress passed a compromise allowing Missouri to enter the Union as a slave state and Maine as a free state, maintaining the balance of power.
2
1823
2 Dec 1823: Monroe Doctrine,President James Monroe announced a U.S. foreign policy opposing European colonialism in the Americas.
3
1825
26 Oct 1825: Erie Canal completed,The Erie Canal officially opened, revolutionizing transportation and trade.
4
1826
4 Jul 1826: Jefferson and Adams die,Former presidents Thomas Jefferson and John Adams both died on the 50th anniversary of the Declaration of Independence.