chief of staff
n. pl. chiefs of staff Abbr. C. of S. or CS
1. The ranking officer of the U.S. Army or Air Force, responsible to the secretary of his or her branch and to the President.2. The senior military staff officer at the division level or higher.
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Chris Scarre — is a writer in the fields of archaeology and ancient history. He obtained his MA and PhD degrees from the University of Cambridge and is a professor in the Archaeology department at Durham University. From 1984 to 1988 he was editor of Past… … Wikipedia