The Chief of Combined Staff of the Unified Armed Forces of the Warsaw Treaty Organization was a post in command of Combined Staff of the military forces of the Warsaw Pact. Furthermore, the Chief of Combined Staff was also a First Deputy Chief of the General Staff of the Armed Forces of the Soviet Union. The post was instituted in 1955 and abolished in 1991.
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Chief of Combined Staff of the Unified Armed Forces of the Warsaw Treaty Organization Wikipedia(Text) CC BY-SA