Situation in Chile as of 11:00 EDT 11 Sep 1973, Report 2, September 11, 1973

Source: Situation in Chile as of 11:00 EDT 11 Sep 1973, Report 2, September 11, 1973 Date: Sep 11, 1973 Archive: CIA Collection: Chile: Secrets of State Sep 11, 2017

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Editorial Analysis

Original analysis by the DriftSeas editorial desk. The complete primary-source document, transcribed from the National Security Archive scan, appears in full below.

A CIA Flashpoint on the Day of the Coup

The declassified memo titled Situation in Chile as of 11:00 EDT 11 Sep 1973, Report 2 is a real‑time intelligence snapshot sent from the CIA’s Directorate of Intelligence to the White House Situation Room and a host of inter‑agency recipients. Dated the morning of September 11, 1973, it was drafted while the military’s artillery was already massing on the outskirts of Santiago and the first shots of the coup were about to be fired. The terse, all‑caps format, the distribution list that includes the National Security Council, the Treasury, the Secret Service and the Pentagon, and the “TOP SECRET” marking all signal that the document was intended to inform senior policymakers of a rapidly evolving crisis that could have immediate implications for U.S. strategic interests in Latin America.

The memo belongs to the broader episode of the Chilean coup d’état that toppled democratically elected socialist President Salvador Allende on September 11, 1973. The United States had, since the election of Allende in 1970, pursued a covert campaign to destabilize his government—funding opposition parties, supporting strikes, and pressuring the Chilean military. By the spring of 1973, the CIA’s “Track II” operations had shifted from political sabotage to preparing the armed forces for a possible overthrow. The document captures the moment when that preparation turned into execution.

Who Was Speaking, and What Their Words Reveal

The memo’s language is deliberately sparse: “PRO‑GOVERNMENT RADIO STATIONS REPORT THAT PRESIDENT ALLENDE HAS REFUSED TO RESIGN, WHILE AN ANTI‑GOVERNMENT STATION INSISTS HE HAS STEPPED DOWN.” This juxtaposition of contradictory broadcasts underscores the chaos on the ground and the information war that both sides were waging. The reference to “ARMY UNITS … MOVING AGAINST SOME PRO‑GOVERNMENT RADIO STATIONS” hints at a tactical effort to silence Allende’s voice, a pattern documented in later testimonies that the junta seized control of the airwaves within hours of the first artillery barrage.

The memo also notes that the army and air force “have declared that they will attack the presidential palace … unless Allende immediately agrees to leave office.” This is the first explicit indication in the U.S. record that the Chilean military was issuing an ultimatum, not merely staging a spontaneous rebellion. The mention of “CARABINIERI UNITS … in the vicinity of the palace” signals uncertainty about the loyalty of the national police, an issue that would later affect the speed with which the junta secured the capital.

Finally, the line about the Socialist Party directing “half of its worker followers to take to the streets in support of the president” reveals that, even as the military prepared to strike, Allende’s base was still mobilizing. The memo’s inclusion of this detail reflects CIA analysts’ concern that mass civilian resistance could complicate the coup’s outcome and potentially draw U.S. forces into a more direct role.

Why This Memo Still Matters

The document is a rare, contemporaneous glimpse into how the United States monitored the coup as it unfolded. It shows that senior U.S. officials were receiving minute‑by‑minute updates, allowing them to calibrate diplomatic messages, adjust covert support, and prepare for the fallout. The fact that the memo was later declassified in 1999, with a National Security Council authority, indicates that the U.S. government recognized the sensitivity of the information for decades.

Beyond the operational details, the memo illustrates the broader Cold War logic that drove U.S. policy: a willingness to tolerate, and even facilitate, the violent overthrow of a democratically elected government if it was perceived as a Soviet‑aligned foothold in the Western Hemisphere. The language of “confused” and “no indication … of a concerted attempt to seize control of the city” betrays a degree of uncertainty that the CIA itself was still grappling with, even as the coup was already in motion.

In historiographical terms, the memo helps scholars reconcile the timeline of events on September 11. It confirms that the military’s ultimatum preceded the artillery barrage that began at 12:30 p.m. local time, and that the United States was aware of the imminent attack well before the world heard the first reports of the palace being bombed. By placing the CIA’s real‑time assessment alongside later testimonies from Chilean officers and U.S. officials, researchers can better understand the extent of coordination, or lack thereof, between Washington and the Chilean conspirators.

The legacy of this document is twofold. First, it serves as evidence in ongoing debates about U.S. responsibility for the human rights abuses that followed the coup, including the repression of leftist groups and the disappearance of thousands of Chileans. Second, it stands as a cautionary example of how intelligence agencies document, and sometimes normalize, the rapid descent into authoritarian violence—a lesson that remains relevant as contemporary powers monitor coups and revolutions around the globe.

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