What did the declassified documents reveal?

This is a declassified Central Intelligence Agency memorandum concerning an aircraft sighting in Manchuria, dated October twentieth, nineteen fifty. The record is notable because it provides a contemporaneous U.S. intelligence assessment of Chinese air activity near the Korean border during the early phase of the Korean War. The memorandum was released to the public through The Black Vault, a digital archive that publishes government documents obtained under the Freedom of Information Act. The declassification was authorized by the Central Intelligence Agency. The full text is available at the Black Vault URL https://archive.org/download/us-china-intel-CI00525/CI00525djvu.txt. The document reads as follows. “SECRET HEADQUARTERS FAR EAST AIR FORCES APO 925‑… U.S. Intelligence Assistant Chief of Staff, G‑2 At nineteen hundred and nineteen hours, the expedition of a B‑29 aircraft was observed over the airfield designated as “B29” in the Str Segi region. The aircraft was engaged in a belly‑low pass. Visibility was excellent and the cloud cover was minimal. The subject of the observation was a flash‑point report; parties were notified between the evening and nineteen hundred hours on October eighteenth. On October nineteenth, at approximately zero‑seven hundred hours, a second aircraft, identified as a B‑29, was observed in the same general area. The aircraft was equipped with a forty‑millimeter field gun. The report notes that the aircraft may have been conducting a training sortie or a fuel‑stop operation. The airfield in question lies on an open plain less than ten miles from the Korean border and would present a suitable target for attack by enemy fighter aircraft. The following questions are raised: What was the origin of the aircraft—Port Arthur or Hunchun? What were the aircraft doing? Were they delivering supplies to North Korean forces? Were they engaged in reconnaissance or a tactical deployment? COMMENTS: The Chinese are likely aware of the heightened tension along the border and would be cautious to avoid incidents that could be interpreted as a display of strength. It is significant that, if a deployment for possible action in Korea were underway, the aircraft would have been positioned to attract attention from the south. No attacks were made against the observed aircraft, any of which would have been vulnerable to fighter interception at the altitude of seven thousand to eight thousand feet. MY COMMENT: In the negative, the likelihood of a large‑scale tactical deployment is extremely doubtful without detection and approval from the Fifth Air Force. —Charles Banpill, Brigadier General, United States Air Force, Deputy for Air

Why was this case declassified?

This material entered the public record through the U.S. declassification and Freedom of Information Act (FOIA) process. The originating source document is linked on this page so the citation chain is auditable.

Case File · ARCHIVE-005Declassified

Filed OCT 31 · 2026Runtime 1 min

Central Intelligence Agency Memorandum Concerning An Aircraft Sighting

U.S. public record · FOIAUpdated October 31, 2026

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◆ BLUF — The short version

This is a declassified Central Intelligence Agency memorandum concerning an aircraft sighting in Manchuria, dated October twentieth, nineteen fifty. S. intelligence assessment of Chinese air activity near the Korean border during the early phase of the Korean War.

Date: OCT 31 · 2026
Release: Declassified · U.S. public record (FOIA)
Source document: View the primary source document

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Episode notes

This is a declassified Central Intelligence Agency memorandum concerning an aircraft sighting in Manchuria, dated October twentieth, nineteen fifty. The record is notable because it provides a contemporaneous U.S. intelligence assessment of Chinese air activity near the Korean border during the…

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Questions about this case

What was Central Intelligence Agency Memorandum Concerning An Aircraft Sighting about?: This is a declassified Central Intelligence Agency memorandum concerning an aircraft sighting in Manchuria, dated October twentieth, nineteen fifty. S. intelligence assessment of Chinese air activity near the Korean border during the early phase of the Korean War.
Why was this case declassified?: This material entered the public record through the U.S. declassification and Freedom of Information Act (FOIA) process. Storyflo narrates it directly from the public release.

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