Why has America stopped winning wars?For nearly a century, up until the end of World War II in 1945, America enjoyed a Golden Age of decisive military triumphs. And then suddenly, we stopped winning wars. The decades since have been a Dark Age of failures and stalemates-in Korea, Vietnam, Iraq, and Afghanistan-exposing our inability to change course after battlefield setbacks.In this provocative book, award-winning scholar Dominic Tierney reveals how the United States has struggled to adapt to the new era of intractable guerrilla conflicts. As a result, most major American wars have turned into military fiascos. And when battlefield disaster strikes, Washington is unable to disengage from the quagmire, with grave consequences for thousands of U.S. troops and our allies.But there is a better way. Drawing on interviews with dozens of top generals and policymakers, Tierney shows how we can use three key steps-surge, talk, and leave-to stem the tide of...