By the end of 1975 there were 20,000 Algerian soldiers in the Spanish Sahara or in the neighboring Tindouf zone .
In December 1975 large numbers of Moroccans were expelled from Algeria , and Algeria began to infiltrate troops into Western Sahara .
By the end of 1975 there were 20,000 Algeria soldiers in the Spanish Sahara or in the neighboring Tindouf zone .
In December 1975 large numbers of Moroccans were expelled from Algeria , and Algeria began to infiltrate troops into Western Sahara .