In this new edition, he reexamines the moral foundations for America's military leadership in the post-9/11 era. Considering world affairs since the first edition - the Gulf War, Bosnia, Afghanistan, Iraq, 9/11, and the emergence of the United States as an unrivaled military power - Hartle explains how these events have raised ethical issues that differ dramatically from those of the Cold War. He assesses how moral, legal, and psychological concerns have been impacted by the war on terrorism, homeland defense, asymmetric warfare, the proliferation of American military interventions, and the UN's role in peacekeeping operations.