This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book focuses on national discussions of the implications of future US sales of military equipment overseas for the US economy. It addresses the domestic economic impact of possible restrictions that might be placed on the sale of specific combat equipment to selected countries in the Middle East. The book draws on prospective demand for advanced equipment through the year 2000 by Jordan and the member states of the Gulf Cooperation Council (GCC). The members of the GCC include: Saudi Arabia, the United Arab Emirates, Bahrain, Kuwait, Oman and Qatar. The book explores the direct income losses which is associated with restraint using available cost estimates for specific items of equipment. Direct income is associated with direct employment and further has a multiplier effect on the surrounding community in terms of both indirect income and employment.