What did the declassified documents reveal?

US Intelligence on China: CINCPAC Command History, 1968 Volume I, Section XV--Intelligence Activities. Released through The Black Vault, a digital archive of declassified documents, this Top Secret record was compiled by the Historical Branch Office of the Joint Secretary Headquarters CINCPAC in 1969. The document, a part of the CINCPAC Command History for 1968, details various intelligence collection programs conducted by PACOM ships and aircraft. One such program, IVY GREEN, focused on collecting intelligence against foreign missile and space activities, particularly Soviet activity in testing their missiles and rockets. This program involved four destroyer escort type ships and four aircraft regularly assigned to CINCPAC's operational control. The document also discusses the importance of strengthening base security, particularly in Thailand, to protect US bases in the region. In November 1968, the Joint Chiefs of Staff advised CINCPAC that the Secretary of Defense had approved an increase in the overall Thai security guard ceiling to 6,031 personnel. Regarding violations of airspace, the document notes that in February 1968, two US Navy A-1 aircraft en route from the Philippines to a US air carrier in the Tonkin Gulf violated the airspace of Hainan Island. One of the planes was shot down by a Chinese MIG interceptor, and the other flew to Danang Air Base in SVN. An investigation concluded that poor navigation was the cause of the incident. The Joint Chiefs of Staff report took into consideration seven other CHICOM violations, four of which occurred over Hainan Island and those which were CHICOM-NVN border violations. The primary cause for these violations was charged to human error with weather and equipment malfunctions being contributing factors. The document also discusses the deployment of the F-111 to Southeast Asia for combat testing. The project, named COMBAT LANCER, involved six aircraft and 369 personnel. The first sorties were made in Route Package I on 25 March, and eventual use against key targets in high threat areas was planned. This is what the public record looks like at its most ordinary. For more declassified documents, visit storyflo.com. The canonical URL for this document is https://archive.org/download/us-china-intel-CI01903/CI01903djvu.txt.

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.

Navy: Us Intelligence On China: Cincpac Command History, 1968 Volume I, Section

◆ BLUF — The short version

US Intelligence on China: CINCPAC Command History, 1968 Volume I, Section XV--Intelligence Activities. Released through The Black Vault, a digital archive of declassified documents, this Top Secret record was compiled by the Historical Branch Office of the Joint Secretary Headquarters CINCPAC in 1969.

Date: AUG 7 · 2026
Release: Declassified · U.S. public record (FOIA)
Source document: View the primary source document

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What was Navy: Us Intelligence On China: Cincpac Command History, 1968 Volume I, Section about?: US Intelligence on China: CINCPAC Command History, 1968 Volume I, Section XV--Intelligence Activities. Released through The Black Vault, a digital archive of declassified documents, this Top Secret record was compiled by the Historical Branch Office of the Joint Secretary Headquarters CINCPAC in 1969.
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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