An appraisal of the methods, materials, settings and properties of the world war, 1939 variety. Not limited to Britain's equipment for war. The geography, the possible battle fronts, military man power, aircraft, naval powers of all involved, potential allies and enemies. Discussion of the possibility of a war of annihilation, a war of attrition, a successful blockade of Germany -- these eventualities are analyzed from various angles. No final answer is suggested. Weighing of the fighting psychology of the countries involved, their resources, their food supplies, their propaganda techniques, their economic stability. You get not conclusions but facts, marshalled in usable form, with sources as valid as any available today. Prepared by Foreign Policy Association in conjunction with Fortune Magazine.