In a March 2001 address to the Association of the United States Army, General Eric Shinseki noted, "We are once again an army between the wars, and once again, we are challenged to adjust to break old paradigms. So we are transforming to become strategically responsive and remain dominant across the entire spectrum of military operations." Army transformation has many dimensions with change in technology, operational methods, and organizations. So far, the focus of organizational transformation has been on the redesign of tactical units such as the interim brigade combat teams. But corps-the Army's operational level organizations-must also be transformed. In his monograph, Dr. D. Robert Worley of the Potomac Institute for Policy Studies provides a history of the structure and function of Army corps and discusses ways they might be redesigned to play an effective role in the 21st century security environment.