In 1976, the Government of Spain abandoned any responsibility for the Saharan territory it had administered de iure for almost 92 years. At that time it ceased to be called Spanish Sahara and became known as Western Sahara, without its decolonization having taken place officially until now, despite being occupied de facto, and in large part, by the Kingdom of Morocco. Did Spain help the Saharawi people to progress and modernize? Did it exercise an oppressive and discriminatory rule, did it behave as an honest and responsible administrator, to what extent was the U.S. government involved in the organization of the Green March, and why did the Spanish government decide to withdraw and cede the administration of the territory to Morocco and Mauritania? An enlightening analysis that accurately unravels the fundamental facts, providing the reader with a solid basis for understanding the questions, without concession to speculation. Gerardo Muñoz is among the most conscientious researchers in Spain, one of the few authors who are not afraid to dive into the archives to recover first hand unknown facts. Manuel P. Villatoro. ABC.