Introduction: The Last Colony in Africa

Western Sahara remains one of the world’s most protracted and overlooked territorial disputes, often described as a frozen conflict in the vast expanse of the Sahara Desert. Stretching across 266,000 square kilometers along the Atlantic coast of North Africa, this sparsely populated but resource-rich territory has been at the center of a bitter struggle between the Kingdom of Morocco and the Polisario Front, the Sahrawi independence movement, since 1975. The United Nations lists Western Sahara as a non-self-governing territory, yet decades of diplomacy have yielded no permanent resolution. The conflict fuses classic elements of decolonization with modern tensions over strategic natural resources, regional power politics, and the unfulfilled promise of self-determination.

Understanding Western Sahara today requires examining its complex history on the African continent—through colonialism, Cold War alignments, and the shifting alliances of the Maghreb region. The struggle for control over its phosphate reserves, one of the world’s largest deposits, alongside an immense fishing zone and potential offshore oil and gas, makes this terrain far more than empty desert. This article provides an authoritative, comprehensive look at the conflict, the stakes, and the prospects for peace in one of Africa’s most stubborn geopolitical impasses.

Historical Background: From Spanish Colony to Contested Territory

Pre-Colonial and Spanish Colonial Era (1884–1975)

Before European colonization, the area now known as Western Sahara was inhabited by Sahrawi nomadic tribes, speaking the Hassaniya Arabic dialect. The tribes maintained complex social structures and territorial claims loosely aligned with tribal confederations. In 1884, Spain declared a protectorate over the coastal region, gradually consolidating control over the interior. The territory was administered as Spanish Sahara until the mid-20th century, with its boundaries formalized through treaties with France, which controlled neighboring Morocco and Mauritania.

Spain invested little in infrastructure development, viewing the territory primarily as a strategic outpost and source of phosphate deposits discovered in the 1940s at Bou Craa. The Sahrawi population largely maintained their traditional way of life, though anti-colonial sentiments grew. In the 1960s and 1970s, as decolonization swept Africa, Spain came under increasing international pressure to hold a referendum on self-determination—a demand the United Nations resolutions had supported since 1966. However, Spain delayed, facing competing territorial ambitions from Morocco and Mauritania, both of which laid historical claims to the land.

The Madrid Accords and the Green March (1975)

The decisive moment came in 1975. As Spain’s aging dictator Francisco Franco lay dying, Morocco’s King Hassan II organized the Green March—a mass demonstration of up to 350,000 unarmed Moroccans who crossed into Western Sahara to press Moroccan sovereignty. The move was a calculated political masterstroke, forcing Spain to negotiate under duress. Under the Madrid Accords (or Tripartite Agreement) of November 1975, Spain agreed to partition administration of the territory between Morocco and Mauritania, a deal the UN General Assembly condemned as invalid.

Spain formally withdrew on February 26, 1976, ending its colonial presence and igniting a full-scale conflict between the Sahrawi independence movement and the two occupying powers. The Polisario Front, established in 1973 with initial backing from Algeria and Libya, proclaimed the Sahrawi Arab Democratic Republic (SADR) on February 27, 1976, the same day Moroccan forces took control of the capital, Laayoune. This set the stage for a prolonged armed struggle.

The War Years: 1975–1991

For the next 15 years, the Polisario Front waged a guerrilla war against Moroccan and Mauritanian forces. Mauritania, facing military pressure and economic collapse, signed a peace agreement with the Polisario in 1979 and renounced its territorial claims. Morocco immediately annex the sector Mauritania had controlled, placing itself in direct control of virtually all of Western Sahara. Supported by Algeria, Polisario fighters used mobile tactics across the desert to strike Moroccan positions and infrastructure, including the Bou Craa phosphate mine and its 100-kilometer conveyor belt system. Morocco responded by building a system of defensive sand walls—the so-called Moroccan Wall—starting in 1980. The wall, eventually stretching over 2,700 kilometers, was fortified with berms, minefields, and surveillance posts. It effectively divided the territory into the Moroccan-controlled zone (approximately 80%) and the Polisario-controlled "Free Zone" in the east. By 1988, both sides had accepted a UN-mediated peace plan.

Current Status of the Conflict: A Frozen Ceasefire Thaws

The 1991 Ceasefire and MINURSO

A United Nations-brokered ceasefire took effect on September 6, 1991. The UN established the MINURSO (Mission for the Referendum in Western Sahara) to oversee the ceasefire and prepare a referendum on self-determination—voting on whether the territory would integrate with Morocco or become independent. However, the referendum plan stalled almost immediately. The core obstacle was disagreement over voter eligibility. Morocco pushed to include tens of thousands of Moroccan settlers who had moved into the territory after 1975, while Polisario insisted on a census based on a Spanish colonial count from 1974. Years of negotiations failed to bridge the gap.

Minurso remains active to this day, though its mandate has been repeatedly renewed without progress on a political settlement. The UN has appointed a series of personal envoys—most notably former U.S. Secretary of State James Baker—who proposed alternative peace plans, including a power-sharing arrangement, but none were accepted by both parties. The process remains deadlocked.

The Breakdown: December 2020 and the Return to Arms

After nearly 30 years of relative calm, the ceasefire collapsed in November 2020. Polisario Front declared it had resumed military operations after Moroccan security forces entered a buffer zone near the Mauritanian border to clear a road. The confrontation escalated after the Polisario blocked a road connecting Morocco with sub-Saharan Africa. Morocco launched a military operation to secure the crossing at Guerguerat, effectively breaking the terms of the 1991 truce. Polisario responded by declaring the ceasefire dead and targeting Moroccan positions along the sand wall.

While small-scale skirmishes and artillery exchanges have continued, full-scale war has not resumed. Nonetheless, the fragility of the military balance is evident, with reports of drone strikes and long-range attacks. The Polisario has also escalated its diplomatic campaign, and Algeria severed diplomatic relations with Morocco in August 2021, largely over the Sahara issue.

The Regional Dimension: Morocco vs. Algeria

The Western Sahara conflict is inseparable from the rivalry between Morocco and Algeria. Algeria has hosted Polisario leadership (the SADR government-in-exile) in the Tindouf refugee camps since 1976, providing diplomatic, financial, and military support. The camps, home to approximately 170,000 Sahrawi refugees (though numbers are disputed), are a permanent source of regional tension. Algeria’s isolated, landlocked position pushes it to seek influence beyond the Maghreb, while Morocco sees the SADR’s existence as a challenge to its territorial integrity. The closure of the shared border in 1994 remains in effect, and the conflict blocks deeper Arab Maghreb Union integration. Thus, the Sahara impasse functions as a proxy for wider geopolitical competition in the western Mediterranean and the Sahel.

Natural Resources: The True Prize

The natural wealth of Western Sahara is the central driver of the conflict—the struggle for control over what lies beneath the sand and off its Atlantic coast explains much of the intractability of the dispute.

Phosphates: The Bou Craa Mine

The Bou Craa phosphate deposit is among the largest and highest-grade in the world, containing an estimated 1.7 billion tons. It is operated wholly by Morocco’s Office Chérifien des Phosphates (OCP), the world’s leading phosphate exporter. The mine and its 150-kilometer conveyor belt—stretching from the interior to the port of Laayoune—are iconic symbols of the territory’s economic value. Phosphate is an essential ingredient in agricultural fertilizers, and global prices have surged as food security concerns intensify. Morocco directly benefits from this production, but its legal right to extract resources in a non-self-governing territory is contested under international law. Several international experts and UN legal opinions suggest that exploitation of natural resources in such territories must benefit the local population and be conducted with their consent. Human rights groups and Polisario have filed legal challenges in European courts over trade deals that include Sahrawi phosphate.

Fisheries: The World’s Richest Fishing Grounds

The Atlantic waters off Western Sahara are among the most productive fishing zones on Earth, thanks to the Canary Current upwelling system. The zone supports vast stocks of sardines, mackerel, octopus, and other species. For decades, Morocco has signed lucrative fishing agreements with the European Union and countries such as Russia, South Korea, and Japan, allowing their fleets to operate in these waters. These agreements have been legally controversial. The EU Court of Justice (CJEU) ruled in 2018 and again in 2021 that the Western Sahara waters cannot be included in EU-Morocco trade and fisheries deals without the consent of the Sahrawi people. However, the EU and Morocco have consistently renegotiated to include explicit and separate protocols for Sahrawi territory, which the Polisario Front continues to reject. The fishing industry provides essential revenue for Morocco but also sustains the local Sahrawi economy in the coastal cities, creating mixed incentives.

Hydrocarbons and Mining Potential

Seismic surveys have indicated significant potential for offshore oil and natural gas reserves beneath the seabed off the Western Sahara coast. In the early 2000s, several major companies (including Kerr-McGee, now part of Chevron, and Total) obtained exploration licenses from the Moroccan government. However, all withdrew after facing intense pressure from human rights organizations, legal uncertainty, and Polisario warnings against unauthorized operations. As of 2024, there is no active offshore oil drilling in Western Sahara waters, though unrealized potential remains a point of interest for global energy markets. On land, the territory also holds unexploited deposits of iron ore, copper, gold, and rare earth elements, though mining operations remain minimal.

Humanitarian and Human Rights Dimensions

The Tindouf Refugee Camps

Approximately 170,000 Sahrawi refugees live in a series of camps near Tindouf, Algeria. These camps have been in existence since the mid-1970s and are administered by the Polisario Front and the SADR. The United Nations High Commissioner for Refugees (UNHCR) and the World Food Programme provide essential aid, but conditions remain challenging. Food insecurity, limited access to education, and severe water scarcity are chronic. The camps also serve as the political and military base of the Polisario Front, where generations have grown up with the goal of returning to a homeland they know mostly through stories. The issue of human rights within the camps themselves—including reports of repression, limited freedom of expression, and the militarization of society—is a sensitive topic largely closed to independent external scrutiny.

Human Rights in Moroccan-Controlled Western Sahara

In the Moroccan-controlled territories—home to the majority of the estimated 600,000 inhabitants—human rights complaints also persist. Residents and international organizations, including Amnesty International and Human Rights Watch, have documented cases of arbitrary detention, torture, and disappearances of perceived pro-independence activists. Freedom of assembly is heavily restricted, and Sahrawi activists face harassment and prosecution by Moroccan security forces. The Moroccan government disputes these claims, emphasizing its investment in the region’s infrastructure, education, and health systems, and its 2004 creation of the Equity and Reconciliation Commission to address past abuses. Nonetheless, the UN, the African Union, and the European Parliament have repeatedly expressed concern about the human rights climate. The issue is complicated by Morocco’s insistence that any human rights monitoring by the UN must not extend to the former Spanish Sahara—a demand that MINURSO’s mandate does not include a human rights component.

International Positions: A Changing Landscape

The United States and the Abraham Accords

The most significant recent shift in the international landscape came on December 10, 2020. In a major breakthrough for Morocco, the United States—under President Donald Trump—announced its recognition of Moroccan sovereignty over Western Sahara, in exchange for Morocco normalizing diplomatic relations with Israel under the Abraham Accords. The move broke with decades of U.S. neutrality. President Joe Biden’s administration has not reversed the recognition, and U.S. diplomatic language continues to reference the 2020 policy shift while also supporting the UN-led process. The recognition is highly controversial and remains the subject of international debate and critical analysis from international law scholars.

The African Union

The SADR is a full member of the African Union (AU), a fact that has long been a point of tension with Morocco. Morocco withdrew from the AU’s predecessor, the Organization of African Unity, in 1984 in protest of the SADR’s admission. In 2017, Morocco rejoined the AU, and the Sahara dispute has become a major issue within the organization, often pitting Morocco’s allies (many French-speaking and Gulf-aligned states) against supporters of self-determination. The AU continues to advocate a negotiated settlement based on self-determination.

The European Union

The EU maintains a complicated stance. Legally, it does not recognize Moroccan sovereignty over Western Sahara. However, its economic relationship with Morocco—a major trade and security partner—is deeply entangled with the territory. The EU’s fisheries and agricultural trade deals with Morocco have been repeatedly challenged in the European Court of Justice, which has ruled that such agreements cannot apply to Western Sahara without the consent of its people. Nevertheless, the EU has found ways to continue cooperation with Morocco that includes the territory through separate protocols. This ambiguous position reflects the competing pressures of legal consistency, economic interests, and realpolitik.

Other Key Players

  • Spain: As the former colonial power, Spain has engaged in periodic diplomatic disputes with Morocco over Western Sahara, especially when managing migration flows and border security in the Spanish enclaves of Ceuta and Melilla. In 2022, Spain formally backed Morocco’s autonomy plan, a major diplomatic shift.
  • France: France is historically Morocco’s closest ally and has never recognized the SADR. It has supported Morocco’s autonomy proposal in the UN Security Council, earning it periodic criticism from Polisario and Algeria.
  • Russia and China: Both have generally supported the UN process without taking a strong position on sovereignty. Russia has occasionally used its Security Council veto threat to moderate language on human rights. China maintains strong economic ties with Morocco and Algeria and pursues a policy of neutrality to protect its investments.
  • Latin American States: Many countries in South and Central America, including Venezuela, Cuba, Ecuador, and Bolivia, have recognized the SADR, reflecting historical ties to the non-aligned movement and solidarity with decolonization causes.

Prospects for a Political Solution: Autonomy vs. Independence

Since 2007, Morocco has presented a proposal for autonomy under Moroccan sovereignty, which would grant the Sahrawi people substantial self-government in local affairs while Morocco retains control over defense, foreign policy, and natural resources. The proposal was backed by the UN Security Council as a "serious and credible" basis for negotiation. The Polisario Front and Algeria, however, reject any plan that does not include the option of full independence in a referendum. The SADR insists that any final settlement must be based on a vote that includes genuine self-determination.

Efforts to restart direct negotiations have repeatedly failed, with the UN Secretary-General’s Personal Envoy, Staffan de Mistura (appointed in 2021), attempting shuttle diplomacy. A key obstacle is the fundamental disagreement over whether the territory is occupied territory awaiting decolonization or disputed territory subject to a sovereignty claim. Without a compromise that bridges these foundational positions, the conflict will remain frozen—or risk melting into direct military confrontation again. The 2020 ceasefire breakdown shows that the frozen status quo is not static; it requires active management to prevent escalation.

What a Realistic Settlement Might Look Like

Most analysts agree that a "win-win" settlement is possible only if both sides make painful compromises. This could involve a creative autonomy or confederation arrangement that satisfies Moroccan sovereignty demands while providing genuine self-rule in Sahrawi-dominated areas, with a future referendum deferred for many years. Another less discussed possibility includes a joint sovereignty or condominium arrangement similar to Andorra’s historical model. However, given the current strategic regional dynamics—Morocco’s strengthened hand after U.S. recognition, Algeria’s new assertiveness post-2021, and the ongoing crisis in the Sahel—a comprehensive political settlement remains distant. The most likely near-term scenario is continuation of the status quo: sporadic military actions, diplomatic maneuvering, and patient international mediation without a final resolution.

Conclusion: The Desert’s Unfinished Business

Western Sahara is far from a forgotten corner of the world. It is a deeply strategic territory whose frozen conflict is sustained by the high stakes of its resources—phosphates, fisheries, and the possibility of offshore energy—and the deep historical grievances of its people. The conflict remains one of the most difficult decolonization problems in modern history, pitting the principle of self-determination against the entrenched geostrategic and economic interests of a powerful regional state. The human toll, whether in the Tindouf refugee camps or in the tense security environment behind Morocco’s sand wall, is a constant reminder of the cost of political deadlock.

As global demand for food security and renewable energy grows, the pressures to resolve this conflict will only increase. A just and lasting peace must ultimately balance the right of the Sahrawi people to choose their own future with the legitimate security and economic interests of Morocco and the wider Maghreb region. For now, the sands of Western Sahara continue to shift, and the world watches for the next chapter in Africa’s last colony.