The United States and Jordan have maintained a valuable mutually-supportive relationship for decades as a result of shared interests in a moderate, prosperous, and stable Middle East. In this monograph, Dr. W. Andrew Terrill highlights Jordan's ongoing value as a U.S. ally and considers ways the U.S.-Jordanian alliance might be used to contain and minimize problems of concern to both countries. Although Jordan is not a large country, it is an important geographical crossroads within the Middle East and has been deeply involved in many of the most important events in the region's recent history. Now, the importance of this relationship has increased, and Jordan has emerged as a vital U.S. ally in the efforts to stabilize Iraq and also resist violent extremism and terrorism throughout the region.