the European incursions on the territory in 1886. The oases of Tuat in the south-east went to the immense territory of the French Sahara. In 1898, in the aftermath of the Spanish–American War, Spain attempted to sell Spanish Sahara to Austria-Hungary; Spain wished to recoup its losses from the conflict and several Austrian ministers wished to obtain an overseas colony to justify naval expansion. However, as Austria-Hungary operated as a dual monarchy with Austria and Hungary having joint control over financial and foreign policy matters, the Hungarian House of Magnates vetoed the purchase and the colony was retained by Spain. In 1912, Morocco itself became a protectorate of Spain and France. When Morocco gained its independence in the 1950s, the country also restated its claims over the still Spanish Western Sahara. In 1958, the Moroccan King Mohammed V in an address at El Ghizlan called for a renewal of the "everlasting allegiance" that some Saharan tribes had pledged to Moulay Hassan I and promised that Morocco would mobilise itself to see the Western Sahara brought under Moroccan rule. Sahrawi tribes The modern ethnic group is thus an Arabized Berber people inhabiting the westernmost Sahara desert, in the area of modern Mauritania, Morocco, Algeria and most notably the Western Sahara, with some tribes traditionally migrating into northern Mali and Niger. As with most Saharan peoples, the tribes reflect a highly mixed heritage, combining Arab, Berber, and other influences, including black African ethnic and cultural characteristics. In pre-colonial times, the tribal areas of the Sahara desert was generally considered bled es-Siba or "the land of dissidence" by the authorities of the established Islamic states of North Africa, such as the Sultan of Morocco and the Deys of Algeria. The Islamic governments of the pre-colonial sub-Saharan empires of Mali and Songhai appear to have had a similar relationship with these territories, which were at once the home of undisciplined raiding tribes and the main trade route for the Saharan caravan trade. Central governments had little control over the region, although some Hassaniya tribes would occasionally extended "beya" or allegiance to prestigious neighbouring rulers, to gain their political backing or, in some cases, as a religious ceremony. Best reference on Sahrawi population ethnography in the Spanish colonial era is the work of Spanish anthropologist Julio Caro Baroja, who in 1952–53 spent several months among native tribes all along the then Spanish Sahara. Spanish Sahara