Since the beginning of the Global War on Terrorism, the US Army Training and Doctrine Command (TRADOC) has captured the experiences of Soldiers as they conducted difficult operations across the world in a variety of important ways. Historical accounts of the US Army's campaigns play a critical role in this process by offering insights from the past to assist Soldiers with their current-and future-operational challenges. This volume, A Different Kind of War, is the first comprehensive study of the US Army's experience in Afghanistan during the first 4 years of Operation ENDURING FREEDOM (OEF). The work focuses on Army operations in the larger Joint and Coalition campaign that evolved between October 2001 and September 2005. Beginning with a description of the successful offensive against the Taliban regime, launched in late 2001 in response to the attacks of 9/11, the book then shifts to the less well-understood campaign that began in 2002 to establish a peaceful and politically stable Afghanistan. A Different Kind of War is balanced and honest. Its publication is particularly timely as both the Army and the Department of Defense are beginning to reassess and restructure the campaign in Afghanistan. This study will shed a great deal of light on the overall course of OEF. As the title suggests, the campaign in Afghanistan was unique. While its initial phases featured the use of small teams of Special Operations Forces and air power, the campaign after 2002 evolved into a broader effort in which conventional forces were responsible for the creation of security, reconstruction, and programs to train the Afghan Army. Overall, the story in these pages is one of a relatively small number of Soldiers conducting multifaceted operations on difficult terrain and within a complex cultural environment. A Different Kind of War was written in recognition of all the men and women who served in Afghanistan to bring stability and prosperity to that country while protecting the security of the United States. Their experiences chronicled in this book will help inform and educate all those who serve the Nation today and in the future.