Free Zone (region) in the context of Mauritania

The Sahrawi Arab Democratic Republic (SADR), also known as the Sahrawi Republic and Western Sahara, is a partially recognized state in the western Maghreb, which claims the non-self-governing territory of Western Sahara, but controls only the easternmost one-fifth of that territory. It is recognized by 44 UN member states and South Ossetia. Between 1884 and 1975, Western Sahara was known as Spanish Sahara, a Spanish colony (later an overseas province). The SADR is one of the two African states in which Spanish is a significant language, the other being Equatorial Guinea.

The SADR was proclaimed by the Polisario Front on 27 February 1976, in Bir Lehlou, Western Sahara. The SADR government calls the territories under its control the Liberated Territories or the Free Zone. Morocco occupies the rest of the disputed territory, and calls these lands its Southern Provinces. The claimed capital city of the SADR is Laayoune (the largest city of the Western Sahara territory). Since the SADR does not control Laayoune, it has established a temporary capital in Tifariti, although most of the day-to-day administration happens in Rabuni, one of the Sahrawi refugee camps located in Tindouf, Algeria.

The Sahrawi Arab Democratic Republic (SADR) was proclaimed by the Polisario Front on 27 February 1976, in Bir Lehlu, Western Sahara. SADR claims sovereignty over the entire territory of Western Sahara, a former Spanish colony; however, at present the SADR government controls approximately 20–25% of the territory it claims. It calls the territories under its control the "Liberated Territories", whilst Morocco claims its territories as the "Southern Provinces".

The Sahrawi Arab Democratic Republic has been recognized by 84 United Nations (UN) member states, but, as of November 2024, only 46 member states recognize it due to numerous member states changing their recognition to "frozen" or "withdrawn". SADR has, at some point in time, been recognized by 38 out of the other 54 (70%) African Union (AU) member states, 18 out of 57 (32%) Organisation of Islamic Cooperation (OIC) member states, and 5 out of 22 (23%) Arab League (AL) member states. Several states that do not recognize the Sahrawi Republic nonetheless recognize the Polisario Front as the legitimate representative of the population of the Western Sahara, but not as the government-in-exile of a sovereign state.

Tifariti (Arabic: تيفاريتي) is an oasis town and the temporary capital of the Sahrawi Arab Democratic Republic, located in north-eastern Western Sahara, east of the Moroccan Berm, 138 km (86 mi) from Smara and 15 km (9 mi) north of the border with Mauritania. It is part of what Polisario Front calls the Liberated Territories and Morocco call the Buffer Zone. It has been the de facto temporary capital of the Sahrawi Arab Democratic Republic since the government moved there in 2008 from Bir Lehlou. It is the headquarters of the 2nd military region of the SADR.

It is also the name of a daïra of the wilaya of Smara, in the Sahrawi refugee camps.

The Moroccan Western Sahara Wall or the Berm, also called the Moroccan sand wall (Arabic: الجدار الرملي, romanized: al-jidār ar-ramliyya, lit. 'sand wall'), is an approximately 2,700 km-long (1,700 mi) berm running south to north through Western Sahara and the southwestern portion of Morocco. It separates the Moroccan-occupied areas (the Southern Provinces) on the west from the Polisario-controlled areas (Free Zone, nominally Sahrawi Arab Democratic Republic) on the east. The main function of the barriers is to prevent a Sahrawi state, keeping independence-seekers away from the region's natural resources, located in the Moroccan-occupied part of the territory.

According to maps from the United Nations Mission for the Referendum in Western Sahara (MINURSO) or the United Nations High Commissioner for Refugees (UNHCR), in many places the wall extends several kilometers into internationally recognized Mauritanian territory.