Defence managers, like their counterparts in both the public and private sector need to learn to cope with change and the resulting uncertainty. This is no easy task for uncertain situations meaning that there are no sure answers or solutions. This volume represents the attempts of its contributors, military and academic, to assist in the process. To some extent uncertainty is nothing new, indeed it may be the only certainty in an era of rapid social change, increasing economic pressures. The end of the Cold War, a rise in global terrorism and rapid developments in informatics have accelerated the pace of change. Tried and trusted techniques that served well in the past are no longer appropriate in an era where defence services must be ready to challenge unknown adversaries, accept a range of responsibilities in operations other than war, and where even fundamental social values are being changed and challenged. This volume maintains a practical focus by offering contributions from serving officers as well as academics. Subjects covered range from the broad context of international affairs since 11 September 2001, to the finer detail of maintaining a proper work-life balance for serving men and women. The editors have set out to make each chapter challenging and informative; to widen the debate in matters of defence management; and to offer practical wisdom to those managers of defence who must cope with uncertain times.