This paper focuses on the problem of desertification in 19 countries of the Sudan-Sahelian zone of Africa and adjacent regions (1). The problem of desertification in these countries and the progress (or lack of it) in the fight against desertification was examined by the author as part of a worldwide assessment by UNEP. The United Nations Sahelian office was responsible for the execution of this part of the study. The results of that analysis have been updated somewhat but not changed significantly. This paper is based on that analysis and a paper presented to the African Development Bank in May 1985 (2, 3).