During the last decades of the 19th century, Spain observed with apprehension the increasing influence of other European powers in the region. The most coherently expressed reason for intervention was fear for the strategic security of Spain. Among others, the Liberal leader Montero Ríos stated that if northwestern Morocco were to come under the civil or military protectorate of France, Spain would see itself besieged perpetually in the north and south by the same power. Furthermore, recent finds of iron ore near Melilla convinced many that Morocco contained vast mineral wealth.