20,000 to 40,000 yrs ago
First Americans cross Beringia
1492
Columbus' first voyage to America
1620
Mayflower arrives off Cape Cod
1775-1783
War of Independence (Revolutionary War)
1788
US constitution ratified
1828-1840
Jacksonian Era
1861-1865
Civil War
1865-1876
Reconstruction of the South
1890
Closing of the Frontier
1876-1910
Gilded Age
1898
Spanish-American War
1914-1918
World War I
1920s
Roaring 20s - Jazz Age
1929
Stockmarket Crash
1929-1940
Great Depression
1933-1939
New Deal
1939-1945
World War II
1945
1st session of the United Nations
1950-1953
Korean War
1955-1968
Civil Rights Movement
1964-1973
US Fights in Vietnam