The relationship between NATO and the various incarnations of a shared European security identity has been a complex one. Since the end of the Second World War and the US's decision to become engaged in Europe's reconstruction, there have been consistent calls on both sides of the Atlantic for a Europe that speaks with one voice on security matters. The institutions of a European security identity, culminating most recently with the European Union's Common Security and Defense Policy (CSDP), are largely modeled after NATO institutions. Why, then, has a constructive transatlantic defense community, that encompasses both NATO and European defense initiatives, not been realized fully?
The primary stumbling block to fuller transatlantic political cooperation, and particularly to a fully institutionalized NATO-EU security arrangement, has been discord surrounding the nature and purpose of a European security identity. While US policy makers have consistently advocated the development of a stronger European security and defense identity as a pillar of a transatlantic security community, European leaders have differed as to whether a European security identity should be developed as such a pillar, or as a pole existing to pursue uniquely European (or national) security interests. Historically, European security integration has progressed further and faster during periods when these two rival notions have been effectively reconciled. It has stalled when they have not. The St. Malo Declaration, commonly viewed as the single most important moment in the development of CSDP, is an excellent example of this trend. While specifically referencing an "autonomous" European defense capability, the "sea change" of St. Malo came with the explicit acknowledgement that CSDP would function as a "pillar" of transatlantic security, and without prejudice to member states' commitments to NATO.
This paper uses burden sharing as a proxy to measure common approaches and integration, the notion being that effective cooperation, either intra-European or transatlantic, will be associated with increasing equality in burden sharing. Using a purpose-built Burden Sharing Index (BSI), the paper will evaluate the extent to which burden sharing has converged among NATO allies both across the Atlantic and within Europe, using convergence as a proxy for both effective European integration and constructive NATO-Europe security engagement.
Maj. Jordan Becker is an instructor of International Relations at the United States Military Academy in West Point. The views expressed here are his own and do not reflect the position of the United States Military Academy, the United States Army, or the Department of Defense.



December 6, 2011
Glen Forbes, ForbesWallace Ltd, (8)
The nature of the relationship between NATO and EU will remain a most complex matter long into the future, I am afraid to say.
It is not simply a matter of agreeing what is the security standing between the two, it is the underlying political wrangles of those Member States who do not have a presence in both organisations.
Without treading into the quagmire of the Greece-Cyprus-Turkey issue, the matter of Malta, Finland and Sweden, to name a few, and their lack of cooperative agreements with NATO constrain the EU's ability to appropriately integrate in any given security operation. This can be found in the EU's very first maritime operation, Op Atalanta - the mission to protect humanitarian provision to Somalia (it's main objective), and the deterrence of piracy off the Horn of Africa and Indian Ocean..
From a public perspective, the safety and security of persons is paramount, but lack of a common aim, a common method of communication, or a common Command, has seen either a duplication of effort and even of capability to overcome the differing, and at times, competing aims of both organisations in a common operation.
It is difficult to see how CSDP can remain an isolated 'pillar' when so many security matters cross over (Kosovo, Afghanistan etc).
Clearly, the non-European Member States of NATO will have their say in any agreements with the EU, but as you rightly point out, equality in burden sharing will be a key issue. A short time ago, the U.S. SecDef urged NATO's European members to cooperate on much-needed defence spending in order to "not hollow out this alliance". The previous SecDef had warned of NATO becoming a two-tiered alliance divided between "those who bore the burden of defence spending and those along for the free ride."
With that viewpoint, the EU CSDP and the spread of European forces between the two organisations, not forgetting the economic constraints, the fuller transatlantic political cooperation and NATO-EU security arrangements have much to sort out in their own houses before such aims can be achieved.