What is the interplay between EU enlargement and a fluctuating transatlantic security partnership? Will the accession of new EU members reinforce this partnership, or instead increase the EU's assertiveness as an independent foreign policy actor?The authors of ""EU Enlargement and Transatlantic Security"" find answers in an examination of broader EU security strategies, the foreign and security policies of the newer and potential EU members, and changing US priorities. Their perceptive analysis offers a sharp lens through which to understand the current and future state of transatlantic security.