Description: This study explores the political use of seaborne force short of full-scale warfare by analyzing comprehensively the influence that the U.S. Navy has exerted in four categories of global twentieth-century crises. Its purpose is, using a complex statistical model, to develop and present naval crisis data useful to policy makers, commanders, and staffs. After detailed groundwork--the unique characteristics, advantages, and disadvantages of naval forces; theoretical background on naval diplomacy and coercion; a review of earlier quantitative research; and explanations of the variables empirical used--the monograph presents and explains in a meaningful way the results of the empirical analyses, terms of crisis characteristics, actors, U.S. involvement, and outcomes.