As the United States emerged as the world’s only superpower, two aspects of its military posture were becoming clear. One was the remarkable ability to project power, much of it stemming from a perceived requirement to be able to contain the Soviet Union during the Cold War years but now giving the United States a unique ability to use such power projection in pursuit of its foreign and security policies. This is covered in Chapter 3, written in 1991, and is followed by another chapter, also written in that year, looking at the other aspect of the post-Cold War US military posture, a major concern with the security of Persian Gulf oil supplies.