Key term for OCR GCSE History B, used in Civil War and Reconstruction 1861–1877.
The Southern legal argument that the Union was a voluntary contract between sovereign states, meaning states had the right to leave if the federal government violated that contract.
Compact Theory appears in OCR GCSE History B revision content for The Making of America (1789–1900), especially Civil War and Reconstruction 1861–1877 and Divisions and causes.
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