THE ASPIRATION AMONG WEST EUROPEAN governments to co-operate not just on economic and trade policies but also on security and defence goes back to the years immediately after World War II.(f.1) The Brussels Treaty Organization (1948) and the subsequent Western European Union (1954) were essentially defensive alliances, while the European Defence Community (established in 1952 and abandoned in 1954) included the notion of a common defence policy and a pooled military capacity governed by a European defence and foreign policy council. Although none of these initiatives provided Europe with the concrete military protection it needed to navigate through the cold war, they are evidence of the fact that European governments have consistently sought channels of co-operation among themselves in addition to participating in the North Atlantic Treaty Organization (NATO).European Political Co-operation allowed European Community members to formulate common foreign policy objectives in the 1970s and 1980s. Its successor when the cold war ended, the Common Foreign and Security Policy (CFSP) of the European Union (EU), added to the policy pronouncements a capacity for modest joint actions. The Balkan wars of the early 1990s underscored for many Europeans the need to develop both political and military capacity in the only European military organization they had - the Western European Union (WEU) - to manage crises that did not really threaten the territorial security of any member of NATO.(f.2) Of course, the same crises also reinvigorated the Atlantic Alliance, ultimately modernizing its command structure and broadening its mission. As a result, the EU and NATO have begun to look like competitors in the crisis management area on the EU's borders.By mid-1996, NATO and the EU appeared to agree on a formula that would allow European initiatives within NATO. The EU would even be able to borrow expensive NATO assets, such as command and control, to undertake European-led, low intensity crisis management operations - the Petersberg tasks - through the WEU.(f.3) In 1997, at its summit in Amsterdam, the EU took over from the WEU both the responsibility for and the management of the Petersberg tasks.This model of constructive co-operation between the aspirations of the European Union and the military capacity of the Atlantic Alliance came to be known as the European Security and Defence Identity or ESDI-in-NATO. There was agreement in principle that NATO and the WEU would prepare for Combined Joint Task Force operations. Yet, the details of this arrangement were never satisfactorily worked out because the aspiration for European independence proved just as strong as the determination of NATO (and especially the Americans) to maintain control over the Alliance's mandate, operations, and assets.(f.4)In an historical meeting at St Malo in December 1998, the French and British governments agreed that the EU should create a 'capacity for autonomous action backed up by credible military forces.'(f.5) Building on this bilateral accord and fuelled by the Kosovo crisis, in December 1999 the EU announced a common European Security and Defence Policy (ESDP), which includes the so-called Headline Goal, that is, the capacity to maintain a rapid reaction force of 60,000 troops with all the military requirements to launch sustainable crisis operations in the European area by 2003.(f.6)The surprising pace with which the EU developed new decision-making structures for ESDP and its apparent progress in assembling military forces for the rapid reaction force, all amidst the controversy over NATO's role in the air war against Serbia, has led to many defensive and 'turf-protecting' debates on both sides of the north Atlantic. The debate is about who decides - NATO or the European Union - when or where to intervene. Moreover, who will do the military planning and operational preparations for such potential interventions? Who can participate if the EU undertakes the action alone? …