Why have the major post-9/11 US military interventions turned into quagmires? Despite huge power imbalances in the United States' favor, significant capacity-building efforts, and repeated tactical victories by what many observers call the world's best military, the wars in Afghanistan and Iraq turned intractable. The US government's fixation on zero-sum, decisive victory in these conflicts is a key reason why military operations to overthrow two developing-world regimes failed to successfully achieve favorable and durable outcomes. In Zero-Sum Victory, retired US Army colonel Christopher D. Kolenda identifies three interrelated problems that have emerged from the government's insistence on zero-sum victory. First, the US government has no organized way to measure successful outcomes other than a decisive military victory, and thus, selects strategies that overestimate the possibility of such an outcome. Second, the United States is slow to recognize and modify or abandon losing strategies; in both cases, US officials believe their strategies are working, even as the situation deteriorates. Third, once the United States decides to withdraw, bargaining asymmetries and disconnects in strategy undermine the prospects for a successful transition or negotiated outcome. Relying on historic examples and personal experience, Kolenda draws thought-provoking and actionable conclusions about the utility of American military power in the contemporary world—insights that serve as a starting point for future scholarship as well as for important national security reforms.

War demands that scholars and policy makers use victory in precise and coherent terms to communicate what the state seeks to achieve in war. The failure historically to define victory in consistent terms has contributed to confused debates when societies consider whether to wage war. This volume explores the development of a theoretical narrative or language of victory to help scholars and policy makers define carefully and precisely what they mean by victory in war in order to achieve a deeper understanding of victory as the foundation of strategy in the modern world.

Volume 5, Deep Maneuver: Historical Case Studies of Maneuver in Large-Scale Combat Operations, presents eleven case studies from World War II through Operation Iraqi Freedom focusing on deep maneuver in terms of time, space and purpose. Deep operations require boldness and audacity, and yet carry an element of risk of overextension - especially in light of the independent factors of geography and weather that are ever-present. As a result, the case studies address not only successes, but also failure and shortfalls that result when conducting deep operations. The final two chapters address these considerations for future Deep Maneuver.

In the immediate aftermath of the 2007 "Surge" of American troops in Iraq, the defeat of al-Qaeda in Iraq (AQI) in Anbar Province was widely hailed as one of America's signature victories. US Marines and soldiers fought for years there, in grinding battles such as Fallujah and Ramadi that define the experience of Iraq. Eventually, the fractious tribal sheiks in that province, with the help of American troops, united in an "Awakening" that dealt AQI a stunning defeat. The Awakening's success argued that the United States could intervene in a war-torn country and, with the right strategy, bring stability and peace. It seemed to exemplify snatching victory from the jaws of defeat. A decade later, the situation in Anbar Province is dramatically different. In 2014, much of Anbar fell to the AQI's successor organization, the Islamic State, which swept through the region with shocking ease. In Illusions of Victory, Carter Malkasian looks at the wreckage to explain why the Awakening's initial promise proved misleading and why victory was unsustainable. Malkasian begins by tracing the origins of the Awakening, then turns his attention to what happened in its wake. After the United States left, Iraq's Shi'a government sidelined Sunni leaders throughout the country. AQI, brought back to life as the Islamic State, expanded in northern and western Iraq and quickly found a receptive audience among marginalized Sunnis. In short order, the progress that had resulted from the Awakening fell apart. Malkasian draws many lessons from Anbar. Chief among them, the most stunning of victories may not last. The fact that the leading model of success fell apart severely damages the idea that the United States can send the military to a country for a few years and create lasting peace. Even the most successful example was bound to deeper social, sectarian, and religious forces insensitive to temporary boots on the ground. From today's perspective, rather than decisive success, Anbar exemplifies how intervention itself is a costly, long-term project. The most brilliant victory could not escape this wisdom.