Immigration 1790 to 1849
In the early years of the U.S., immigration was only about 6000 people a year on average, including French refugees from the slave revolt in Haiti. The French Revolution, starting in 1789, and the Napoleonic Wars from 1792 to 1814 severely limited immigration from Europe. The War of 1812 (1812–1814) with Britain again prevented any significant immigration. By 1808 Congress had banned the importation of slaves, slowing that human traffic to a trickle.