Although the cold war persisted during the Kennedy and Johnson administrations, it underwent significant modification. While the Sino-Soviet split provided new opportunities and posed new challenges for U.S. policy, such factors as the Vietnam War, the ongoing Middle East crisis, and the Soviet invasion of Czechoslovakia emerged as major diplomatic hurdles. The cables, reports, and memoranda in the National Security Files for the Soviet Union and Eastern Europe document a wide range of diplomatic relations between the United States and the Eastern bloc during this critical period. Moreover, the files provide valuable information on and analyses of Soviet internal affairs. As additional materials in the Kennedy and Johnson National Security Files are released, UPA will announce supplements for the appropriate sections.
Details are available upon request.