War has returned to Europe, and NATO stands at the forefront of the response to Russia's aggression in Ukraine. But how does NATO function? How do NATO member s

In this new Brookings Marshall Paper, Michael O'Hanlon argues that now is the time for Western nations to negotiate a new security architecture for neutral coun

This book examines the development of cooperation between the EU and NATO, two key non-state actors in the European security architecture. The work examines the

The Kremlin has sought to establish an exclusive Russian sphere of influence in the nations lying between Russia and the EU, from Georgia in 2008 to Ukraine in