Secretaries of State

John C. Calhoun

Biography of Secretary of State, John C. Calhoun

John Caldwell Calhoun was appointed Secretary of State by President John Tyler on March 6, 1844. Calhoun entered duty on April 1, 1844, and left the positio...Read More >>

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Milestones

Prague 1968

On August 20, 1968, the Soviet Union led Warsaw Pact troops in an invasion of Czechoslovakia.

Education

A Journey Shared

For teachers: A curriculum guide exploring 200 years of U.S.-China relations.

Countries

Vietnam

A guide to the history of U.S. diplomatic relations with Vietnam.