The Time Line:

Colonial Era (1607 - 1776) Colonial Era (1607 - 1776)
American Revolution (1775 - 1783) American Revolution (1775 - 1783)
Formation of Government (1783 - 1815) Formation of Government (1783 - 1815)
Expansion Westward (1803 - 1860) Expansion Westward (1803 - 1860)
Civil War (1861 - 1865) Civil War (1861 - 1865)
Reconstruction (1865 - 1877) Reconstruction (1865 - 1877)
Gilded Age (1870 - 1900) Gilded Age (1870 - 1900)
Progressive Era (1890 - 1920) Progressive Era (1890 - 1920)
World War I (1914 - 1918) World War I (1914 - 1918)
Roaring Twenties (1920 - 1929) Roaring Twenties (1920 - 1929)
Great Depression (1929 - 1939) Great Depression (1929 - 1939)
World War II (1939 - 1945) World War II (1939 - 1945)
Cold War (1947 - 1991) Cold War (1947 - 1991)
Civil Rights Movement (1954 - 1968) Civil Rights Movement (1954 - 1968)
Vietnam War Era (1955 - 1975) Vietnam War Era (1955 - 1975)
Modern America (1980 - Present) Modern America (1980 - Present)
Native American Heritage Native American Heritage
Others Others