The Chilean military overthrew Salvador Allende’s government on 11 September 1973. Declassified U.S. records document Washington’s opposition to Allende, covert policy and contemporary reporting on the coup. Reading those records requires distinguishing the 1970 intervention efforts from evidence about the military operation three years later.
Correction, 7 October 2026: The fiftieth anniversary fell in 2023. This evergreen guide replaces unsupported document links and claims with identifiable archival records.
In this article
Start with identifiable records
| Source | What to look for |
|---|---|
| FRUS Volume XXI, document 347 | Kissinger’s 11 September 1973, 5 p.m. situation report to Nixon. |
| FRUS Volume E–16 | A broader documentary sequence on Chile, 1969–1973. |
| National Security Archive’s 2013 document collection | Records and commentary on Kissinger’s policy toward Allende. |
What the coup-day memorandum shows
Document 347 reports the military takeover, a state of siege, curfew and demands for government officials to surrender. Its source note identifies the Nixon Presidential Materials, NSC Files, Box 777. It is a contemporary briefing containing preliminary and unconfirmed reporting, not a complete retrospective account.
When citing it, preserve the distinction between what the memorandum reported and what later investigations established. Its descriptions of casualties or individuals should not be repeated as settled facts simply because the document is declassified.
The U.S. role needs a timeline
The State Department’s historical overview discusses electoral funding, anti-Allende propaganda and the 1970 Track II proposal. It also distinguishes those activities from the question of direct support for the September 1973 coup. That overview is a retired background resource; the documentary volumes provide the more precise citation trail.
Do not collapse policy hostility, covert intervention, foreknowledge and direct operational participation into one claim. For each assertion, identify the relevant actor, date, action and document. An order or proposal may establish intent without demonstrating that every proposed action occurred.
How to check a citation
- Record the volume, document number and original date.
- Read the source note and editorial footnotes.
- Compare the record with documents before and after it.
- State clearly whether you are describing a document’s language, an established event or an interpretation.
This approach preserves the importance of the declassified record while making the basis and limits of each conclusion visible.