Causes
The city of Sidi Ifni was incorporated into the Spanish colonial empire in 1860. The following decades of Franco-Spanish collaboration resulted in the establishment and extension of Spanish protectorates south of the city, and Spanish influence obtained international recognition in the Berlin Conference of 1884. In 1946, the region's various coastal and inland colonies were consolidated as Spanish West Africa.
Immediately following its independence from France in 1956, Morocco began expressing interest in the Spanish possessions, claiming it was historically and geographically part of Moroccan territory.
Read more about this topic: Ifni War