This volume presents a collection of 47 articles describing different aspects of U.S. Marine Corps participation in Operation Iraqi Freedom during 2003. As with the previously published anthologies on the Spanish American, Vietnam, and Persian Gulf Wars, our intent is to provide a general overview that will serve as an interim resource for educating Marines and informing the public about the conflict, until the History Division completes an intended series of monographs dealing with major Marine Corps operations in that campaign. As the operational environment continues to mature, the authors' varied accounts will also serve as an introduction to changing tactics and strategies encountered or developed by Marines conducting stability and support operations in Iraq. Subsequent volumes will cover other campaigns being conducted elsewhere during the Global War on Terrorism.