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10 - PEOPLE/(T-Z)/Reuven Yerdor.md
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---
category: "Intelligence & Government"
tags:
- Person
- Military
- Intelligence
- CIA
- NSA
- Israel
- Soviet
- Military
summary: "Reuven Yerdor, also known as Rudi, was an accomplished linguist and a senior officer in Israel's Detachment 515 (later redesignated Detachment 8200), which is in charge of signals intelligence and code-breaking."
---
Reuven Yerdor, also known as Rudi, was an accomplished linguist and a senior officer in [[Israel]]'s Detachment 515 (later redesignated Detachment 8200), which is in charge of signals intelligence and code-breaking. He had cracked a Soviet code, for which he later received [[Israel]]'s highest defense medal. By early 1982, Yerdor had been promoted to brigadier general and was in charge of [[Unit 8200]], the Israeli communications intelligence service.[^1]
Yerdor worked closely with his counterparts in the American [[National Security Agency|NSA]], traveling to [[Washington D.C.]] every three months for liaison meetings. His official title was deputy chief of staff for military intelligence in the [[Israel Defense Forces]]. Over the 1981–82 New Year's holiday, Yerdor was summoned by [[Yehoshua Saguy]], the head of Aman (military intelligence), and given two packets of documents to evaluate: one with highly technical American intelligence describing a Soviet military system in the hands of the Arabs, and the other with daily and weekly summaries of worldwide [[National Security Agency|NSA]] intercepts.[^1]
Yerdor worked closely with his counterparts in the American [[NSA|NSA]], traveling to [[Washington, D.C.]] every three months for liaison meetings. His official title was deputy chief of staff for military intelligence in the [[Israel]]. Over the 1981–82 New Year's holiday, Yerdor was summoned by [[Yehoshua Saguy]], the head of Aman (military intelligence), and given two packets of documents to evaluate: one with highly technical American intelligence describing a Soviet military system in the hands of the Arabs, and the other with daily and weekly summaries of worldwide [[NSA|NSA]] intercepts.[^1]
In February 1982, [[Israel]] learned that the Soviets had decided to upgrade the Syrian air defense command with SA-5 missiles. Yerdor was told that there was very little intelligence available on the system, but two days later, he received full U.S. intelligence on the SA-5, which made it clear it was not as good as feared. In mid-May 1982, three weeks before the invasion of [[Lebanon]], Yerdor's office received an astonishing assortment of invaluable American technical data about the air defense systems in [[Syria]], including detailed information on side-looking radar, electronic maps, and precise frequency of operations for [[Syria]]'s SA-6, SA-8, and advanced SA-3 surface-to-air missile systems.[^1]