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Territorial Expansion and Sectional Crisis
Manifest Destiny Texas annexation, the Oregon boundary, and California James K. Polk and the Mexican War; slavery and the Wilmot Proviso Later expansionist effort John L. O’Sullivan on Manifest Destiny, 1839 Expansionism & Manifest Destiny Manifest Destiny Resources Manifest Destiny Digital History: Manifest Destiny Map of Territorial Growth The Handbook of Texas Online – Texas Annexation President James Polk and the War Against Mexico (1846) Mexican War Wilmot Proviso Digital History: The Political Crisis of the 1840s – Wilmot Proviso Digital History: Westward Expansion – The Pacific Northwest