This book has the following features: - When we say "West," what do we really mean? The prologue sets out to explore this question from literary, historical, strategic, philosophical, and cultural vantage points - In order to understand today's West, different shades of the long and arduous transatlantic dialogue starting with Christopher Columbus's accidental discovery of America to the collapse of Soviet Union have been reasonably accounted for. The second chapter traces back this evolutionary journey in simple, easily understandable way. - The book has been a fifteen-year story of phenomenal change, which redefined the very nature of the Western Alliance after the collapse of Soviet Union. - Changes in the geopolitical map of Europe, emergence of European Union, re-orientation of NATO, and the mutual play between the United States and Europe all throughout the decade of 1990s have been woven into the narrative of this book with the aim to understand how the West, if at all, has changed. - Three major events of post-Cold War history-the Balkan Crisis, the 9/11, and Iraq War 2003-had played major stimulus in re-understanding the West. Detailed chronological accounts of these events have been presented before the reader. - What are the rationale, motivations, and implications of EU and NATO's enlargements to the East, and how has the enlargement impacted the Alliance. - The epilogue reflects upon what has changed and what continues in today's West across different historical phases. - How have the schemes of European security in post-cold war era been coexisting with the changing face of NATO is yet another theme this book seeks to address.