This 6-volume set contains documents illustrating the origins of political and territorial authority, and the course of inter-state relations and claims, traditional trade and tribal activity in the area of the Saudi-Yemen border. The Arabian Geopolitics series is a series of documentary studies that examine the key issues in the political evolution of strategic regions of the Arabian Peninsula. It explores the historical background to contemporary developments in political and territorial authority. It highlights the interaction of inter-state relations and claims, traditional trade and tribal activity and the extent to which natural resources dictate national claims. The editor, Richard Schofield, is Deputy Director of the Geopolitics Research Centre, School of Oriental and African Studies, London, and editor or author of numerous studies on Arab boundary questions.