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Historical Documents
Department History
Key Milestones
- The Founding Era
- Diplomacy and Revolution
- The Early Republic
- Securing the Republic
- The Antebellum Period
- The Civil War
- The Age of Imperialism
- Into the Twentieth Century
- The First World War
- The Interwar Period
- World War II
- The Cold War
- Bi-Polar Foreign Policy
- Entangling Alliances
- Détente
- Quest for Peace
- Cold War Denouement
- Toward the Twenty-First Century
Guide to Countries
More Resources
Department History
Principals and Chiefs Chronological Listing
Select a year to view the Principal Officers and Chiefs of Mission who served in that year.