المسيرة الخضراء
In the late 19th-century, Western Sahara formally became a Spanish colony. After the Green March pressure and the Madrid Accords of 1975, Spain unilaterally disengaged itself leaving the territory to Morocco and Mauritania, who split the territory, giving two thirds to the former, in a movement that was not recognized by the UN. The Polisario Front rejected this illegal move and declared in Bir Lehlou, the Sahrawi Arab Democratic Republic (SADR) as the state representing an independent Western Sahara.