The Office of the Historian’s “Subject Taxonomy of the History of U.S. Foreign Relations” covers 504 subjects, organized into three major sections: People, Places, and Topics. Drill into one of these sections, or view the full taxonomy.

The taxonomy has been applied to a small but growing segment of the resources on the Office of the Historian’s website: 65 biographies of the Secretaries of State and 555 volumes from the Foreign Relations of the United States series.

With 22,706 tags applied to date, this growing resource exposes connections across the accumulated knowledge of the Office of the Historian.