A Short History of the Department of State
- 1830–1860: Diplomacy and Westward
Expansion
- Indian Treaties and the Removal Act of 1830
- The Amistad Case, 1839
- The Opening to China Part I: the First Opium War, the United States, and the
Treaty of Wangxia, 1839–1844
- Webster-Ashburton Treaty, 1842
- The Oregon Territory, 1846
- The Annexation of Texas, the Mexican-American War, and the Treaty of
Guadalupe-Hidalgo, 1845–1848
- Founding of Liberia, 1847
- United States Maritime Expansion across the Pacific during the 19th
Century
- Gadsden Purchase, 1853–1854
- The United States and the Opening to Japan, 1853
- The Opening to China Part II: the Second Opium War, the United States, and the
Treaty of Tianjin, 1857–1859
- Territorial Expansion, Filibustering, and U.S. Interest in Central America and
Cuba, 1849–1861