| A | B |
| 1862 | Homestead Act |
| 1887 | Dawes Act |
| 1872 | Mining Act |
| 1879 | Klondike Gold Rush |
| Chisholm Trail | Cattle Trail from TX to Kansas |
| September 16, 1893 | Oklahoma Land Rush |
| Morril Act | Land Grant Colleges |
| Timber Culture Act | gave land for planting trees |
| National Reclamation Act | set up irrigation districts |
| Land Revision Act | gave govt power to fight forest fires |
| Forest Management Act | beginning of large scale govt. regulation |
| Railroads | greatest advancement of 20th century |
| 1849 | California Gold Rush |
| Theodore Judah | began railroads in US |
| Great Migration | blacks leaving south to go north |
| Entrepreneus | creates a new business |
| Alexander Graham Bell | invented telephone |
| Thomas Edison | invented lightbulb |
| Henry Bessemer | invented steel process |
| 500 families | controlled nation's wealth |