Operation Allied strength, the 1999 NATO air crusade that sought to avoid a much broader humanitarian catastrophe in Kosovo, represents the triumph of air strength to a few observers and highlights air power_s boundaries for others. whereas representing a winning cooperative allied army motion for NATO, it additionally indicates limits to U.S.-European army cooperation. This document, a dispassionate review of Operation Allied strength, presents views from each side of the Atlantic in addition to political and army implications. The crusade highlighted the transforming into hole among U.S. army services and people of Europe, the capability results of becoming a member of a limited-objective operation that expands to bad proportions and length, the absence of consensus either in the U.S. army and the Alliance at the top use of air energy, the vulnerabilities of a multimember army coalition engaged in an primarily humanitarian operation dealing with an adversary struggling with for its survival, and the constraints inherent in a fight-and-negotiate method that left an unrepentant adversary in strength. The document concludes that the ecu allies can count on persevered emphasis at the safeguard features Initiative, a U.S. plan followed by means of NATO that stresses the necessity for all NATO forces to be interoperable, deployable, and sustainable. moreover, the Europeans needs to opposite fresh developments of safety rate reductions and make investments extra in an effort to observe significant advancements in protection capabilities.