What did the declassified documents reveal?

Cold open. This is an intelligence memorandum from the Central Intelligence Agency, Directorate of Intelligence, dated January 1970, titled “Military Forces Along the Sino‑Soviet Border.” It is notable because it provides a contemporaneous assessment of Soviet and Chinese force deployments during a period of heightened tension along the border. Provenance. The memorandum was released to the public through a Freedom of Information Act request and posted on The Black Vault website. The declassification authority was the CIA’s Office of the Director. The document is available at archive.org under the URL https://archive.org/download/us-china-intel-CI01947/CI01947djvu.txt. The document. The memorandum opens with a classification banner and reads: “DIRECTORATE OF INTELLIGENCE Intelligence Memorandum Military Forces Along the Sino‑Soviet Border SR IM 70‑5 January 1970” The text continues: “From the end of World War II until the middle of the sixties, the Soviets did not look upon China as a hostile power. The only Soviet force of any consequence along the border with China was a low‑strength army with four divisions near Vladivostok, oriented primarily against U.S. forces in Korea and Japan. In 1965, however, ideological and territorial disputes between the Chinese and Soviet leaderships were growing increasingly bitter. At that time the Soviets made the decision to build up their military forces significantly along the border with China. Since 1965 Soviet ground and air forces in regions adjacent to the Sino‑Soviet border have more than doubled, adding roughly 280,000 men. Ground forces along the border have been built up from some fourteen divisions in 1944—only two of which were combat‑ready—to at least twenty‑eight divisions now. About half of these are new combat‑ready units. In addition, units which could form the base for as many as six more divisions have been identified along the border. Some seventy‑five thousand well‑trained border guards are also stationed in the area. Since 1965 the Soviets have created a new tactical air army with some 360 combat aircraft in the Far‑East and Mongolia area. One new fighter regiment with about forty aircraft has been added to the Eastern Military District, bringing the total for these two air armies to six hundred combat aircraft. The Scud mobile missile system, which can deliver a nuclear warhead to a range of five hundred nautical miles, has been deployed along the border since 1967. The Soviet buildup continued throughout 1969 at about the same steady rate as in previous years. There is no evidence so far that the pace of the buildup has been changed as a result of the border clashes which began last March or because of the opening of the Sino‑Soviet talks in Peking last October. Although the number of new divisions identified last year was considerably below that in 1964 and 1966, the filling out of existing divisions probably kept the flow of men and equipment to the border as high last year as it…

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.

CIA Military Forces Along The Sino‑soviet Border.

◆ BLUF — The short version

Cold open. ” It is notable because it provides a contemporaneous assessment of Soviet and Chinese force deployments during a period of heightened tension along the border. Provenance. The memorandum was released to the public through a Freedom of Information Act request and posted on The Black Vault website.

Date: AUG 6 · 2026
Release: Declassified · U.S. public record (FOIA)
Source document: View the primary source document

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Episode notes

Cold open. This is an intelligence memorandum from the Central Intelligence Agency, Directorate of Intelligence, dated January 1970, titled “Military Forces Along the Sino‑Soviet Border.” It is notable because it provides a contemporaneous assessment of Soviet and Chinese force deployments during a…

View the primary source document

Questions about this case

What was CIA Military Forces Along The Sino‑soviet Border. about?: Cold open. ” It is notable because it provides a contemporaneous assessment of Soviet and Chinese force deployments during a period of heightened tension along the border. Provenance. The memorandum was released to the public through a Freedom of Information Act request and posted on The Black Vault website.
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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CIA Military Forces Along The Sino‑soviet Border.

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