| A | B |
|---|
| 1776 | Signing of the Declaration of Independence |
| 1787 | U.S. Constitution written in Philadelphia |
| 1861-1865 | U.S. Civil War was fought |
| 1789 | U.S. Constitution ratified and became law of the land |
| 1791 | Bill of Rights added to Constitution |
| 1898 | Spanish-American War |
| 1876-1900 | Gilded Age |
| 1900-1919 | Progressive and Reform Era |
| 1914-1918 | World War I; U.S. entered in 1917 |
| 1920's | Roaring Twenties |
| 1929 | U.S. Stock Market crashed |
| 1930's | Great Depression |
| 1939-1945 | World War II; U.S. entered after attacke on Pearl Harbor in 1941 |
| December 7, 1941 | Japanese attacked Pearl Harbor, Hawaii |
| 1950's | Cold War |
| 1960's | Civil Rights Movement; Vietnam Protests |
