Spain had not occupied the large area in the Bight of Biafra to which it had right by treaty, and the French had busily expanded their occupation at the expense of the territory claimed by Spain. Madrid only partly backed the explorations of men like Manuel Iradier who had signed treaties in the interior as far as Gabon and Cameroon, leaving much of the land out of 'effective occupation' as demanded by the terms of the 1885 Berlin Conference. More important events such as the conflict in Cuba and the eventual Spanish–American War kept Madrid busy at an inopportune moment. Minimal government backing for mainland annexation came as a result of public opinion and a need for labour on Fernando Pó.