-
1803
France sells Louisiana territories to USA -
1804
Louis and Clark expedition sets off -
1808
Atlantic Slave Trade abolished -
Period: to
1812-1815
War of 1812 between the US and Britain -
1846
Mexican War -
1848
California Gold Rush -
1853
Gadsen Purchase -
1854
Opponents of slavery set up Republican Party -
1860
Republican candidate Abraham Lincoln is elected president -
1860
11 pro-slavery southern states secede from the union and for confederate states of America -
1863
Lincoln issues Emancipation Proclamation -
1865
Confederates are defeated -
1898
US gains Puerto Rico