Operation Dropshot
（重定向自Dropshot）
Operation Dropshot was the United States Department of Defense codename for a contingency plan for a possible nuclear and conventional war with the Soviet Union and its allies in order to counter the anticipated Soviet takeover of Western Europe, the Near East and parts of Eastern Asia expected to start around 1957. The plan was prepared in 1949 during the early stages of the Cold War and declassified in 1977. Although the scenario did make use of nuclear weapons, they were not expected to play a decisive role.