- Westward Expansion Primary Source Collection (Links to an external site.)
- Virginia and Kentucky Resolution, 1798 (Links to an external site.)
- Monroe Doctrine, 1823 (Links to an external site.)
- Cherokee Nation v. the State of Georgia (Links to an external site.), 1831
- Black Hawk [Ma-ka-ta-i-me-sh-a-kiak] (1767-1838): Surrender Speech (Links to an external site.), 1832
- Washington Irving: A Tour on the Prairies (Links to an external site.), 1835
- John L. O’Sullivan: On Manifest Destiny (Links to an external site.), 1839
- The Treaty of Guadaloupe Hidalgo (Links to an external site.), 1848
- Frederick Jackson Turner (1861-1932): The Significance of the Frontier in American History (Links to an external site.), 1893, excerpts,
- Frederick Jackson Turner (1861-1932): The Frontier in American History (Links to an external site.), 1893
- Virginia Reed Murphy: Across the Plains in the Donner Party: A Personal Narrative of the Overland Trip to California (Links to an external site.)