Bohlen, Charles Eustis (1904-1974), a U.S. diplomat, was an expert on Soviet affairs. Bohlen was ambassador to the Soviet Union from 1953 to 1957, to the Philippines from 1957 to 1959, and to France from 1962 to 1968. He served as undersecretary of state for political affairs from January 1968 to January 1969.