The expansion of the shipbuilding industry in Britain and the United States between 1938 and 1945 was one of the greatest economic feats in history. This study examines in detail the unprecedented growth both in total industrial capacity and that of individual shipyards. Lindberg and Todd go beyond the normal descriptive historical account of this expansion to analyze it through the application of a geographical perspective. Specifically, they apply the geographic concepts of clustering and agglomeration to the merchant and naval shipbuilding industries of both nations during this vital era.