OpenStax
Open Stax: Free Soil or Slave? The Dilemma of the West
By reading this section of a chapter on "Westward Expansion," students will be able to describe the terms of the Wilmot Proviso and the Compromise of 1850, discuss why the Free-Soil Party objected to the westward expansion of slavery and...
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Course Notes: Us History: 1840 1877: Expansion and Slavery
A list with short descriptions of the issues and events that impacted the expansion of the frontier, with slavery being the most significant issue.