The use of Integrated Security Constructs—overlapping, detailed sets of planning scenarios and associated assessment tools—in the 2010 Quadrennial Defense Review (QDR) provides the United States with a clean break from Cold War–era force planning. Although we maintained the longstanding measure of succeeding in two substantial conventional conflicts overseas, we also tested the force against a broader set of projected threats, many of them inconceivable to the prior generation of defense planners.