This extensive study of the German seaports of Hamburg and Bremen just before the outbreak of World War I covers all conceivable aspects (location, expansion, administration, geography, shipping companies and merchant fleets, sea connections, etc.) and thus serves as a treasure trove for those interested in port and regional history. The areas of the Outer Elbe and Outer Weser are described, as well as the ports and their connections to the hinterland. A significant part of the work deals with the description of the historical port facilities, the respective local shipping companies, and their merchant fleets.