This book surveys the legacy of public diplomacy initiatives and lessons from the Bush era war on terrorism and discusses how culture, networks and communication dynamics are redefining US public diplomacy grand strategy. Battles to Bridges provides a rich, historical review and analysis of the critical post-9/11 period of US public diplomacy and lays the ground work for theory building in public diplomacy.Part I: Crisis Public Diplomacy surveys the programs and legacy of lessons of the now historic, post 9/11 period of US public diplomacy. Part II: Changing Dynamics explores how changes in political and communication features of the international arena, including culture and networks dynamics, impacted US public diplomacy strategy.  Part III is devoted to public diplomacy theory building across the three strategic levels of grand strategy, strategy and tactics.