Western Sahara was formerly a Spanish colony known as the
Spanish Sahara. In the 1970s,
Spain faced mounting pressure from
Morocco to relinquish the territory, culminating in the
Green March, a large-scale military invasion and civilian demonstration organized by the
Moroccan government on November 6, 1975 in order to compel Spain to transfer Western Sahara to Morocco. The
Madrid Accords, ratified just 12 days after the Green March, stipulated that Spain would exit Western Sahara by February 28, 1976, at the latest. Subsequently, Morocco and
Mauritania signed the
Western Sahara partition agreement on April 14, 1976. This agreement led to Morocco assuming control over
Saguia el-Hamra and the northern portion of
Río de Oro, while
Mauritania took charge of the remaining part of
Río de Oro, renaming it as
Tiris al-Gharbiyya. The
Polisario Front, a locally based
national liberation movement of the native
Sahrawi people, continued its preexisting
guerrilla war against the new occupying powers, with significant financial and logistical support from
Algeria and
Libya. Their goal was to achieve independence as the
Sahrawi Arab Democratic Republic (SADR), proclaimed on February 27, 1976. After years of conflict in Western Sahara, Mauritania signed a peace agreement with the Polisario Front in 1979, formally renouncing its claim to the southern part of the territory. With Mauritania's withdrawal, Morocco moved quickly to annex the area previously held by Mauritania, effectively extending its occupation over part of the region known as Río de Oro. Since a
United Nations-brokered ceasefire agreement in 1991, approximately two-thirds of the territory has been occupied by Morocco, encompassing most of the coastline. This area is separated from the eastern third controlled by the Polisario Front, referred to by them as the
Free Zone, by the
Moroccan Western Sahara Wall or "the Berm". The ceasefire line corresponds to the route of the Berm, with both sides asserting sovereignty over the entire territory of Western Sahara. The Sahrawi Arab Democratic Republic has
received recognition from 84 nations, including Mauritania, and is a full member of the
African Union, though not of the UN. The
Arab League implicitly recognizes Moroccan territorial integrity, albeit with significant reservations from Algeria and Syria. ==Overview==