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Ehud Barak served as a soldier in the Israel Defense Forces (IDF), the Israeli National Police, and the Mossad. He was a member of the Sayeret Matkal, an elite commando unit, and served as its commander from 1977 to 1978. He also served as the IDF Chief of Staff from 1991 to 1995 and as Prime Minister of Israel from 1999 to 2001.