Dictionaries, Thesauruses, Pictures, and Press Releases
- Soto, Hernando De, Explorations of
- South Africa, Relations with
- South America, Relations with
- South Carolina Declaration of Causes of Secession (1860)
- South Carolina Exposition and Protest
- Southeast Asian Americans
- Southern Campaigns
- Southern Commercial Conventions
- Southern Rights Movement
- Southern Unionists
- Southwest Territory
- Sovereigns of Industry
- Sovereignty, Doctrine of
- Sow Case
- Soybeans
- Spanish Borderlands
- Spanish Colonial Official's Account of the Triangular Trade with England (c. 1726)
- Spanish Conspiracy
- Spanish Dollar
- Spanish-American War, Navy in