This chapter chronicles how the United States designed and adjusted its alliance commitments in Western Europe and East Asia during the first three decades of the Cold War (1949-1980). The purpose of this chapter is not only to introduce historical events to readers, but also to highlight key variation decision-makers implemented changes in American strategic posture and, by extension, the security guarantees provided to American allies. It covers how the United States expanded its commitments around the world early in the Cold War before contracting them by the late 1960s amid changes to the nuclear balance between it and the Soviet Union.
