The European Union’s new European Security and Defense Policy (ESDP) is a major step toward full European integration, in parallel with progress toward a Common Foreign and Security Policy. The United States supports ESDP - but on the basis that it is created within NATO, separable but not separate from the Alliance, and drawing mainly on NATO’s military assets. This book tells the story of ESDP’s relationship to NATO - and what must be done to ensure that the storehouse of European security is increased and transatlantic cohesion is preserved.